3D Trademarks vs. Series Marks: Key Differences and Brand Protection Strategies

By Zahraa Zoughaib, in collaboration with Bahia Alyafi.

Introduction: The Role of 3D Trademarks and Series Trademarks in Intellectual Property Protection

Trademarks play a crucial role in protecting brand identity, ensuring that consumers can easily distinguish one company's products or services from another. While traditional trademarks often consist of words, logos, or symbols, there are other specialized forms of trademark protection that cater to unique branding elements. 3D trademarks, safeguard distinctive product shapes or packaging, and series trademarks, which allow businesses to register multiple variations of a mark under a single application. Understanding the differences between 3D trademarks and Series Trademarks is essential for businesses looking to protect their intellectual property effectively. This article explores what 3D trademarks and series trademarks protect, their benefits, registration processes, and how they help brands maintain exclusivity and positioning in the market. We will first start with defining Series trademarks:

What are series Trademarks?

A series trademark involves multiple trademarks that are similar but differ only in minor, non-distinctive elements that do not significantly alter the core identity of the trademark. These marks are not only nearly identical, but they are also registered in the same jurisdiction, owned by the same entity, and cover the same range of products and services. In countries where series trademarks are allowed, a single registration can cover multiple variations of the same brand, granting protection to each version with only one registration number.

Because series trademarks include more than one mark, they are subject to extra requirements compared to standard trademarks. Various trademark offices have shared guidelines and illustrative examples on what makes a series of trademarks acceptable. The main takeaway is that changes applied to each mark in the series must not alter its core identity. If a variation changes the mark’s identity in terms of appearance, sound, or meaning, the entire series may be rejected. Below is a summary of these criteria along with examples.

Acceptance Criteria	Acceptable Example and Reasoning	Unacceptable Example and Reasoning
Upper vs. lower case letters	HEARTACHE heartache Changing letter case doesn’t alter identity.	MYSTORE MyStore Mystore MystOre The last version (“MystOre”) creates a new meaning, “Myst” + “Ore,” disrupting consistency.
Combined or separated words	BLACK POINT BLACKPOINT Visual difference doesn’t change pronunciation.	CATSCAN CAT SCAN “CAT SCAN” could be read as “CATS CAN,” changing meaning.
Plural vs. singular	GRAZE GRAZES One is the plural of the other.	CHARLE CHARLES “CHARLES” is not the plural of “CHARLE.”
Punctuation differences	UKNY U.K.NY Punctuation doesn’t change the mark’s identity.	ESCAPE / E'SCAPE Apostrophe affects pronunciation and interpretation.
Minor spelling differences	CENTRE-FUGUE  CENTER-FUGUE  “Centre” and “Center” are acceptable variations.	MYXCHANGER MY EXCHANGER Second version has a completely different meaning.
Different linking words	FUN & RELAX FUN AND RELAX Both convey the same meaning.	SAVE FOR COUPONS SAVE 4 COUPONS The meanings differ due to the change in expression.
Device elements in word marks	Trafwicbook Border doesn’t change identity.	WEBWORKS Symbols significantly alter the mark.
Positioning of visual elements	Position doesn’t affect identity.	Element placement significantly changes appearance.
Color differences (not the key identity)	Color change doesn’t alter identity.	Colors suggest different brand interpretations.
Color is the main identity	Acceptable when color isn’t key.	If color defines the design, it changes the identity.

Why Are Series Trademarks Useful?

Standard trademarks need to be registered exactly as they will be used. Therefore, when one uses a trademark in different ways with minimal changes, these variations are not directly protected. In countries where series trademarks are not an option, you would need to register each variation separately, which can be very expensive.

In countries where series trademark registration is available, a single registration may cover all variations, saving significant costs. This means that multiple trademark variants can be registered as a single application, granting protection to each version by only paying for one registration.

However, it is important to note that series trademark registration is not available in all countries.

Series trademarks can be registered in several jurisdictions, including but not limited to Australia, Bangladesh, Hong Kong, India, Ireland, Malaysia, New Zealand, Pakistan, Singapore, and the United Kingdom.

In such countries, the criteria for what constitutes an acceptable series can vary significantly.

Figure 1: Series TMs with Different Combinations

Figure 2: Series TMs in Different Colors

Figure 3: Series TMs with Different Locations

How Do You Know When You Can Register a Series Trademark?

Not all countries have the option of registering series trademarks, and the rules differ from one jurisdiction to another. To determine if your trademarks can be registered as a series, it is essential to contact a local expert. Below is a list of some of the jurisdictions which have series trademarks and a small comparison of criteria used according to local practices:

Series marks in the Middle East:

Algeria – Series marks: In Algeria, series trademarks may be registered if the variations between marks are limited to:

• Non-distinctive changes (e.g., minor design tweaks, color variations).
• Small differences in descriptive elements (e.g., product numbers, model names).
• Nearly identical representations, where the overall commercial impression remains unchanged.

Trademark	Filing number	Class	Filing date
	DZ/T/2010/000917	12	29-March-2010

Bahrain – Series marks: In Bahrain, series trademarks are accepted when the differences involve:

• Minor modifications (e.g., color, typography, or non-distinctive graphical elements).
• Adjustments in goods/services descriptions without altering the mark’s core identity.
• Similar visual, phonetic, or conceptual impressions across all marks in the series.

Trademark	Filing number	Class	Filing date	Applicant
	BH/T/1/117167	36	31-August-2016	DISCOVER FINANCIAL SERVICES

Egypt – Series marks: In Egypt, a series of trademarks may be registered if:

• Variations are non-essential (e.g., size, color, or minor textual differences).
• The core distinctive elements remain identical across all marks.
• Changes do not affect the trademark’s overall recognition or distinctiveness.

Trademark	Filing number	Class	Filing date	Applicant
	525459	9	16-November-2023	Zain Group

Jordan - Series marks: In Jordan, series trademarks are permitted when:

• Differences are minimal and non-distinctive (e.g., slight design changes, color shifts).
• The marks share the same dominant elements in appearance, sound, and meaning.
• Variations do not create consumer confusion or alter the mark’s identity.

Trademark	Filing number	Class	Filing date	Applicant
	80544	25	19 June 2005	You Gov plc

Kuwait - Series marks: In Kuwait, series trademarks are accepted when the differences between marks involve:

• Insignificant variations in design, color, or non-distinctive elements.
• Small adjustments in text (e.g., product numbers, model names) without changing the mark’s core identity.
• Similar representations where the marks look, sound, and convey the same commercial impression.

Lebanon - Series marks: In Lebanon, series trademarks must meet the following criteria:

• Nearly identical representations with only minor deviations (e.g., color, font).
• Non-substantive changes in descriptive text (e.g., product codes, disclaimers).
• No material alteration to the mark’s distinctive character.

Morocco - Series marks: In Morocco, series trademarks are accepted if:

• Variations are insignificant (e.g., color, minor graphical adjustments).
• The essential features of the mark remain consistent across all versions.
• Changes do not affect the mark’s ability to function as a single brand identifier.

Trademark	Filing number	Class	Filing date
	218732	38	17-Sep-20

Oman - Series marks: In Oman, series trademarks may be registered when:

• Differences are limited to non-distinctive elements (e.g., labels, numbers, or colors).
• The marks are substantially the same in appearance, sound, and meaning.
• Variations do not mislead consumers or dilute the mark’s distinctiveness.

Trademark	Filing number	Class	Filing date	Applicant
	059796	43	28-Oct-2009	Frasers Hospitality Pte Ltd.

Qatar - Series marks: In Qatar, series trademarks may be registered if the variations between marks are limited to:

• Non-distinctive changes that do not alter the overall identity of the trademark.
• Minor modifications in color, size, or descriptive elements (e.g., numbers, product names).
• Nearly identical representations, where differences do not affect the trademark’s essential character.

TM	Registration number	Class	Registration date
	QA/T/1/141423	32	16 Aug 2021

Saudi Arabia - Series marks: In Saudi Arabia, series trademarks are permitted if the variations between marks are limited to:

· Non-distinctive elements that do not significantly alter the trademark’s identity.

· Minor differences in goods or services listed in the trademark.

· Changes in color, provided the overall impression remains the same.

Product protected:

Trademark	Registration number	Class	Filing date	Applicant	Description
	SA TM-01-00-14651-24	9	22-Apr-2024	Chocoladefabriken Lindt & Sprüngli AG	Twenty-one sequential trademarks, all consisting of the words Lindt and Lindor written in distinctive Latin letters separated by a horizontal line and a distinctive dragon next to the word Lindt on a distinctive circular motif wrapped in a white leaf pattern, all in white, black, tan, brown, dark tan, silver, gray, gold, yellow, light pink, pink, dark pink, light blue, blue, dark blue, red, dark red, orange, mint green, light green, dark green, purple. Show less...

Tunisia - Series trademarks : In Tunisia, a series of trademarks may be registered if the variations involve:

• Insignificant modifications that do not affect the distinctive character of the mark.
• Changes limited to aspects such as color, size, or minor graphical elements.
• Identical or nearly identical representations with only non-distinctive alterations.

Trademark	Filing number	Class	Filing date	Applicant
	100/1255472	3, 25, 18, 35	10-May-2017	LC WAIKIKI MAGAZACILIK HIZMETLERI TICARET ANONIM SIRKETI

United Arab Emirates - Series marks: In the UAE, series trademarks are accepted when the differences between marks are restricted to:

• Non-material variations that do not change the overall impression of the trademark.
• Adjustments in color, minor design elements, or descriptive text.
• Identical or highly similar representations with negligible differences.

Trademark	Filing number	Class	Filing date
	373501	35	29-Mar-2022

Yemen - Series marks: In Yemen, a series of trademarks may be registered if the variations consist of:

• Minor differences that do not affect the distinctive character of the mark.
• Changes in color, typography, or non-essential graphical elements.
• Nearly identical representations with only slight modifications.

Series marks in other International countries and Jurisdictions:

Australia - Series marks: In Australia, the differences between versions in a series should be limited to:

• Changes in the goods or services mentioned in the trademark.
• Modifications to the number, price, quality, or names of places.
• Color changes in the trademark.

New Zealand - Series marks: In New Zealand, series trademarks are accepted when the variations differ in:

• Goods or services described in the trademark name.
• Number, price, quality, or names of places.
• Other non-distinctive changes that do not substantially alter the trademark's identity.
• Color changes in the trademark.

Singapore - Series marks: In Singapore, each version in a series mark must:

• Resemble the others in representation.
• Have differences that are non-distinctive and do not alter the overall identity of the trademark.

TM	Registration number	Class	Registration date
	40202253621H	9, 42	5 May 2023

United Kingdom - Series marks: In the United Kingdom, the marks in a series must:

• Look the same.
• Sound the same.
• Mean the same.

TM	Registration number	Class	Registration date
	UK00901984079	16, 39, 42	1 Jul 2005

Minor differences are allowed, and a series can consist of up to six marks in a single application. Other countries with series trademark protection include Bangladesh, Hong Kong, India, Ireland, Malaysia, & Pakistan.

On the other hand, there are some countries which do not officially recognize series trademarks such as the United States.

Comparison of Protection Criteria: 3D Trademarks vs. Series Marks

A 3D trademark primarily protects the shape, configuration, or packaging of a product, ensuring that consumers associate the distinctive design with a specific brand. In contrast, a series trademark safeguards multiple variations of a brand under a single registration, allowing businesses to maintain flexibility while ensuring brand consistency.

To qualify for registration, a 3D trademark must be distinctive and non-functional, meaning it cannot serve a purely utilitarian purpose. Series trademarks, on the other hand, must retain a common core element across all variations, ensuring that the overall identity of the mark remains consistent.

The Longchamp Le Pliage handbag design is a notable case. Longchamp successfully registered the three-dimensional shape of its folded handbag (with its characteristic trapezoidal structure and flap) as a 3D trademark. This trademark protects the distinctive shape and folding mechanism associated with the brand. One key limitation of 3D trademarks is that they cannot protect purely functional shapes, as trademark law does not permit monopolization of essential product features. This restriction does not apply to series trademarks, which focus on branding elements rather than product design. Additionally, a 3D trademark protects a single, unique design, while a series trademark provides greater flexibility by allowing multiple registered variations under one mark.[BAY1]

Functional elements cannot be protected under trademark law, as the primary focus of trademarks is to protect distinctive and non-functional features that indicate the source of goods or services. Functional elements are considered essential product features, and granting trademark protection for them could unfairly restrict competition by creating a monopoly on practical or utilitarian aspects.

With 3D trademarks, there is always a risk that elements such as the shape of a product or specific parts (e.g., flaps or handles) may be flagged as functional rather than ornamental. Trademark examiners may reject such applications if they determine that the design is primarily utilitarian and lacks distinctive branding elements.

To mitigate this risk, it is often advisable to file trademarks in a form that emphasizes ornamental or branding aspects. For instance, adding distinctive features like specific colors, patterns, or placements can improve the likelihood of registration. As a result, a filing strategy that combines 3D designs with visual elements focused on branding, such as color placement, can offer greater enforcement versatility while avoiding potential objections from trademark examiners.

The registration process for a 3D trademark often requires evidence of acquired distinctiveness, especially if the shape is not inherently unique. Conversely, a series trademark application must demonstrate that all variations maintain a consistent brand identity without substantial changes.

In terms of examination, a 3D trademark must not serve a functional purpose, whereas series trademarks are assessed based on whether their variations significantly alter the trademark’s identity. Despite these differences, both 3D trademarks and series trademarks can be protected indefinitely, as long as they remain in use and continue to be recognized as distinctive by consumers.

Examination Criteria and Registration Process

To register a 3D trademark, the shape must meet the criteria of distinctiveness and must be capable of identifying the source of goods or services. The registration process typically requires proving that the 3D shape has been used in commerce and has become associated with a particular brand. In some jurisdictions, applicants must submit proof of acquired distinctiveness through use to overcome objections that the shape is generic.

For a series trademark, the registration process requires demonstrating that all variations share a common unifying element and that the differences do not substantially alter the overall identity of the mark. While a single application covers multiple variations, jurisdictions that allow series trademarks may impose specific criteria for acceptable differences, such as minor changes in color, stylization, or descriptive elements. Additionally, some trademark offices charge extra fees for multiple variations within the same registration.

Despite these differences, both types of trademarks undergo strict examination to ensure they meet the legal requirements for distinctiveness and brand protection.

Duration of Protection

Both 3D trademarks and series trademarks can be protected indefinitely, as long as they remain in use and maintain their distinctiveness. However, if a 3D trademark becomes generic or loses its ability to identify the brand, its protection may lapse. Similarly, if a series trademark's variations no longer retain their core branding element or are not consistently used, the registration may become vulnerable to cancellation.

Scope of Protection: 3D Trademarks vs. Series Marks

The scope of protection for both 3D trademarks and series trademarks revolves around consumer recognition and ensuring that the public is not misled about the origin of goods or services. A 3D trademark protects distinctive shapes, configurations, or packaging that serve as brand identifiers, preventing competitors from using similar designs that could create confusion. Series trademarks, on the other hand, safeguard multiple variations of a brand name, logo, or design under a single registration, ensuring consistency in branding. While both require continuous use in commerce to maintain validity, 3D trademarks primarily focus on the physical representation of a product, whereas series trademarks may extend to variations involving positioning, color combinations, and branding elements.

Can a 3D Trademark also be a Series Mark?

In rare cases, a 3D trademark could also qualify as a series mark if multiple variations of the product shape share a common distinguishing feature. However, most jurisdictions do not allow 3D shapes to be registered as series marks, as series marks are typically reserved for variations of word marks or logos, rather than product shapes.

Product	3D trademark	Series trademark
	The iconic Pepsi Globe: a three-dimensional sphere with red, white, and blue fields, represents the brand's distinctive shape and design. The application usually includes: 1. A detailed description of the 3D shape. 2. Visual representations (images or drawings) of the product or packaging. 3. Evidence of acquired distinctiveness, if applicable.	Variations of the logo and packaging, such as different color schemes or modifications for specific product lines (e.g., Pepsi Zero Sugar), ensure comprehensive protection of branding variations. The application typically includes: 1. A description of the shared core elements across the series. 2. Visual representations of each variation. 3. Evidence showing that the variations do not substantially alter the identity of the mark.

Pepsi's branding demonstrates elements of both 3D and series trademarks. The iconic Pepsi Globe—a three-dimensional sphere with red, white, and blue fields—is an example of a 3D trademark, as it protects the distinctive shape and design associated with the brand. Additionally, Pepsi employs series trademarks by registering variations of its logo and packaging, such as different color schemes or slight modifications for specific product lines (e.g., Pepsi Zero Sugar). This combination ensures comprehensive protection of both the physical design and branding variations, reinforcing Pepsi's identity across markets.

How a Series Mark and a 3D Trademark Can Overlap

A series trademark cannot directly become a 3D trademark, as they serve distinct purposes and have different registration requirements. However, a brand could evolve in a way that allows for both protections to apply under different circumstances. 3D Trademark and Series mark can overlap in three keyways:

1. Brand Evolution Leading to 3D Trademark Registration

If a series trademark consists of multiple variations of a logo, wordmark, or stylized brand name, and the brand later develops a distinctive 3D product shape or packaging that becomes widely recognized, the company may apply separately for a 3D trademark to protect that shape.

Example: A fashion brand with a series trademark for different stylized logos may later design a signature handbag shape that becomes iconic and seeks 3D trademark protection for that shape.

A real-world example is Coca-Cola. The brand holds a series trademark for its iconic logos, including variations in font styles and designs. Later, Coca-Cola successfully registered the distinctive contour shape of its glass bottle as a 3D trademark. While the logos and the bottle shape are separate elements, they collectively reinforce Coca-Cola's brand identity. This demonstrates how a brand can evolve its intellectual property strategy by protecting both stylized branding elements through a series trademark and a unique product design through a 3D trademark.

Coca-Cola's logo evolution began in 1886 with a simple serif font, transitioning to the iconic Spencerian script in 1887, which has remained a hallmark. Over the years, the logo saw various transformations, including decorative swirls (1890-1891), the Red Disc for advertising (1947-1960s), and the fishy Arciform shape (1958-1960s). The introduction of the white wave, or Dynamic Ribbon Device, in 1969 marked a significant shift, later enhanced with accents and bubbles in 2003. By 2007, the design returned to a clean, classic look, celebrating milestones like the 125th anniversary in 2011 and incorporating the One Brand strategy in 2016.

 Coca-Cola's iconic contour bottle was first registered as a 3D trademark in the United States on April 12, 1960. This registration protects the distinctive shape and design of the bottle, which has become synonymous with the brand's identity.

2. Coexistence of Series Marks and 3D Trademarks

A company may register both a series trademark and a 3D trademark to protect different aspects of its brand.

Example: A perfume brand could have a series trademark for different label designs while also securing a 3D trademark for a uniquely shaped bottle associated with its products.
This image highlights the evolution of the CHANEL No. 5 perfume bottle from 1921 to 1986, showcasing its protection as both a 3D trademark and a series mark. The rectangular body, faceted stopper, and symmetrical proportions define its distinctive 3D trademark, while variations in labeling, typography, and proportions across versions reflect its potential as a series mark. Together, these elements reinforce CHANEL's brand identity through consistent yet adaptable design.

Series Mark	3D Mark
	[BAY2]

Ferrero Rocher provides a great real-world example of combining both series and 3D trademarks. The brand has a series trademark for its logo and packaging designs, which include variations in the placement of the Ferrero Rocher name, fonts, and decorative elements on its packaging. Additionally, Ferrero Rocher has sought 3D trademark protection for the distinctive shape and presentation of its chocolates. This includes the spherical chocolate wrapped in gold foil, placed in a pleated brown paper cup, and topped with a sticker bearing the Ferrero Rocher name. The 3D trademark ensures that the unique combination of shape, packaging, and presentation is protected, preventing competitors from imitating the iconic design. Meanwhile, the series trademark safeguards the variations of the branding elements, such as different logo placements or packaging styles, ensuring consistency across product lines. Together, these trademarks strengthen Ferrero Rocher's brand identity and provide comprehensive protection for both its physical product design and branding elements.

3. Branding Elements Moving Toward 3D Recognition

If a series mark consistently features a recurring 3D shape (such as variations of a logo appearing on a uniquely shaped product), it might eventually gain distinctiveness as a 3D trademark if consumers start recognizing the shape itself as a brand identifier.

Example: If a company owns a series mark for different variations of a logo printed on a uniquely curved beverage bottle, and over time, consumers associate the bottle’s shape with the brand, the company may apply for a 3D trademark for the bottle design.

Enforcement of Series Marks vs. 3D Trademarks

Enforcing a series trademark can be more complex than enforcing a 3D trademark, especially when determining whether an infringing mark is too similar to the protected variations. Since a series mark allows multiple versions of a brand name, logo, or design under one registration, infringement cases often revolve around whether the core distinguishing element remains recognizable despite minor differences. For example, McDonald's protects "McChicken," "McFlurry," and "McMuffin" as part of its "Mc" series mark, making it easier to challenge unauthorized uses of similar prefixes, such as "McCoffee" or "McBurger." However, proving infringement can become difficult if an alleged infringer argues that their variation is sufficiently distinct.

McDonald's Corporation v. Quality Inns International, Inc. (1988, U.S.) McDonald's sued Quality Inns over plans to launch "McSleep," arguing it infringed upon its family of "Mc" trademarks (e.g., "McChicken," "McNuggets," "McMuffin"). The court ruled in McDonald's favor, recognizing the distinctiveness of the "Mc" prefix through extensive advertising and concluding that "McSleep" could cause consumer confusion, setting a strong precedent for protecting series trademarks.

McDonald's International Property Co Ltd v. Gianni and Another (2007, South Africa) McDonald's opposed the registration of "McCoffee" by a South African company, arguing it infringed on its established "Mc" prefixed trademarks. The court agreed, concluding that "McCoffee" could mislead consumers into thinking it was associated with McDonald's. This reinforced McDonald's ability to protect its series trademarks effectively.

In contrast, 3D trademarks typically provide a more straightforward path to enforcement because they protect a specific product shape or packaging. Once a 3D trademark is registered, it serves as prima facie evidence of ownership, allowing brands to focus their legal battles on consumer confusion rather than proving distinctiveness each time. A well-known example is the Coca-Cola contour bottle, which has been successfully enforced against lookalike bottle designs that could mislead consumers.

While both series marks and 3D trademarks offer strong brand protection, 3D trademarks tend to be easier to enforce, as they rely on a fixed, recognizable product shape rather than multiple branding variations. However, both types of trademarks play a crucial role in protecting brand identity, and businesses must carefully choose the right strategy based on their products and market positioning.

Conclusion: The Strategic Advantage of Series Marks in Brand Evolution

Series trademarks offer businesses a flexible and cost-effective way to protect multiple variations of a brand under a single registration. By allowing companies to evolve their branding while maintaining legal protection, series marks serve as a powerful tool for long-term brand consistency and market expansion.

A prime example is Apple’s iPhone series, where the core brand name "iPhone" remains consistent across generations—iPhone 12, iPhone 13, iPhone 14—while still allowing for innovation and differentiation. Similarly, McDonald's "Mc" series secures its naming structure across products like McChicken, McFlurry, and McMuffin, reinforcing its brand identity worldwide.

From global giants to emerging businesses, companies that leverage series trademarks can adapt to changing consumer trends without losing their core identity. As branding strategies continue to evolve, series marks remain an essential asset for companies looking to build and protect a dynamic, recognizable presence in competitive markets.

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[BAY1]Can you add an image of the bag protected by Longchamp get the image from public database, NOT something we worked on internally!

[BAY2]Is this how they filed their marks?