Design Patent FTO Basics

Design patent FTO helps teams assess whether product appearance creates patent risk before launch. When companies think about FTO analysis, they typically focus on utility patents—patents covering how a product works. But there’s another category of patents that companies often overlook: design patents—patents covering how a product looks.

Design patents can pose significant FTO risks, particularly in consumer products, electronics, and fashion. Yet many companies conduct FTO analysis without adequately considering design patent risks. This article explains why design patents matter for FTO and how to assess design patent risks.

What are Design Patents?

Definition

A design patent protects the ornamental design of a functional article. It covers the visual appearance of a product—its shape, surface ornamentation, and overall aesthetic design.

design patent search

Examples of Design Patents

• The shape of an iPhone (Apple’s design patents)
• The distinctive shape of a Coca-Cola bottle
• The design of a furniture piece
• The shape of a car’s grille
• The layout of a user interface

Why Design Patents Matter for FTO

Design Patents are Frequently Used

Companies in consumer-facing industries actively use design patents to protect their products’ appearance. A single product may be covered by multiple design patents.

Design Patents are Enforceable

Design patents are enforceable in court. Companies actively enforce design patents against competitors.

Design Patents are Often Overlooked

Many companies conducting FTO analysis focus on utility patents and miss design patent risks.

Design Patents Can Block market entry

A design patent infringement finding can result in an injunction preventing product sales, just like a utility patent.

How Design Patent Infringement Works

The design infringement search

Design patent infringement is determined using the “ordinary observer test.” A design patent is infringed if an ordinary observer, familiar with the prior art, would find the designs substantially similar.

Two-Part Test:

1. Scope of the Design Patent: What is the scope of the design patent’s protection?
2. Similarity to Accused Design: Is the accused design substantially similar to the patented design?

Factors Affecting Infringement

Visual Similarity:

• Overall appearance
• Specific design features
• Proportions and relationships

Prior Art:

• What design features were known before the patent?
• What design features are novel?
• What design features are ornamental vs. functional?

Ordinary Observer Perspective:

• Would an ordinary observer find the designs substantially similar?
• What would an ordinary observer focus on?

Example Design Patent Infringement Analysis

Patented Design: A smartphone with a distinctive rectangular shape, rounded corners, and a specific arrangement of buttons and ports.

Accused Design: A competitor’s smartphone with a similar rectangular shape, rounded corners, and similar button/port arrangement.

Infringement Analysis:

• Visual similarity: High (similar overall shape and arrangement)
• Prior art: Other smartphones have rectangular shapes and rounded corners
• Ordinary observer: Would find the designs substantially similar
• Conclusion: Likely infringement

Conducting Design Patent FTO Analysis

Step 1: Identify Relevant Design Patents

Search for design patents:

• Search USPTO design patent database
• Search competitor design patents
• Search design patents in your product category
• Use design patent classification codes

Identify design patents that might cover your product:

• Patents covering similar product types
• Patents covering similar design features
• Patents held by competitors

Step 2: Understand the Patented Design

Review the design patent:

• Study the drawings (the most important part of a design patent)
• Understand what design features are claimed
• Understand what design features are ornamental vs. functional
• Review the specification (if provided)

Identify key design features:

• Overall shape and proportions
• Specific design elements
• Surface ornamentation
• Distinctive features

Step 3: visual comparison search

Visual Comparison:

• Compare your product’s overall appearance to the patented design
• Compare specific design features
• Assess visual similarity

Functional vs. Ornamental:

• Identify which design features are purely ornamental
• Identify which design features are dictated by function
• Functional features may not be protected by design patents

Prior Art Consideration:

• Are the design features novel or were they known before the patent?
• Do other products have similar design features?
• What design features are distinctive to the patented design?

Step 4: Assess Infringement Risk

Assess Visual Similarity:

• High similarity: High infringement risk
• Moderate similarity: Moderate infringement risk
• Low similarity: Low infringement risk

Consider Ordinary Observer Perspective:

• Would an ordinary observer find the designs substantially similar?
• What would an ordinary observer focus on?

Assess Enforcement Likelihood:

• Is the patent holder known for enforcing design patents?
• Is the patent holder a competitor?
• Is the patent holder an NPE?

Overall Risk Assessment:

• High risk: High visual similarity + high enforcement likelihood
• Medium risk: Mixed factors
• Low risk: Low visual similarity or low enforcement likelihood

Step 5: Develop Mitigation Strategies

Design Modification:

• Modify your product’s design to avoid visual similarity
• Maintain functionality while changing appearance
• Consider whether design changes affect product appeal

Licensing:

• Negotiate a license from the patent holder
• Incorporate licensing costs into business planning

Validity Challenge:

• Challenge the design patent’s validity
• Argue that design features are functional, not ornamental
• Argue that design features were known in prior art

Risk Acceptance:

• Accept the risk and proceed
• Maintain contingency planning

Real-World Examples: Design Patent Infringement

Example 1: Apple vs. Samsung

Apple held design patents on the iPhone’s distinctive shape, rounded corners, and overall appearance. Samsung’s Galaxy phones had similar design features. Apple sued Samsung for design patent infringement and won significant damages.

Lesson: Design patents can be valuable and enforceable. Companies should take design patent risks seriously.

Example 2: Furniture Design Patents

A furniture company held design patents on distinctive chair designs. A competitor created chairs with similar overall shapes and proportions. The patent holder sued for design patent infringement.

Lesson: Design patents apply to many product categories, not just electronics.

Example 3: Bottle Design Patents

Coca-Cola’s distinctive bottle shape is protected by design patents. Competitors cannot create bottles with substantially similar shapes without risking infringement.

Lesson: Design patents can protect iconic product designs for decades.

Common Design Patent FTO Analysis Errors

Error 1: Ignoring Design Patents Entirely

Problem: You conduct FTO analysis focusing only on utility patents and ignore design patents.

Consequence: You miss design patent risks.

Solution: Include design patents in your FTO analysis.

Error 2: Misunderstanding Functional vs. Ornamental

Problem: You assume all design features are protected, even if they’re dictated by function.

Consequence: Overestimating design patent risks.

Solution: Understand that design patents protect only ornamental features, not functional features.

Error 3: Insufficient Visual Comparison

Problem: You don’t conduct a thorough visual comparison of your product to the patented design.

Consequence: Inaccurate infringement assessment.

Solution: Conduct detailed visual comparison, considering overall appearance and specific features.

Error 4: Ignoring Prior Art

Problem: You don’t consider whether design features were known before the patent.

Consequence: Overestimating design patent scope.

Solution: Consider prior art when assessing design patent scope.

Error 5: Underestimating Enforcement Risk

Problem: You assume design patents are rarely enforced.

Consequence: Underestimating FTO risks.

Solution: Research patent holder’s enforcement history.

Design Patent Validity Challenges

Grounds for Challenging Design Patent Validity

Lack of Novelty:

• Design features were known in prior art
• Prior art design is substantially similar to patented design

Obviousness:

• Design would have been obvious to a designer of ordinary skill
• Design is a predictable variation of prior art designs

Functional Design:

• Design features are dictated by function, not ornamental
• Design features are not protectable

Inadequate Disclosure:

• Patent drawings don’t adequately show the design
• Specification doesn’t adequately describe the design

Validity Analysis for Design Patents

Design patent validity analysis is similar to utility patent validity analysis but focuses on design features rather than functional features.

Steps:

1. Identify prior art designs
2. Compare patented design to prior art
3. Assess whether design is novel
4. Assess whether design is obvious
5. Assess whether design features are functional or ornamental

Best Practices for Design Patent FTO Analysis

1. Include Design Patents in FTO Analysis

Don’t focus only on utility patents. Include design patents.

2. Search Comprehensively

Search for design patents covering your product category and competitors’ products.

3. Understand Functional vs. Ornamental

Understand that design patents protect only ornamental features.

4. Conduct Visual Comparison

Conduct detailed visual comparison of your product to patented designs.

5. Consider Prior Art

Consider whether design features were known before the patent.

6. Assess Enforcement Likelihood

Research the patent holder’s enforcement history.

7. Develop Mitigation Strategies

For high-risk design patents, develop design modifications or licensing strategies.

8. Monitor Design Patents

Monitor design patents in your product category for new filings.

Conclusion

Design patents pose significant FTO risks that are often overlooked. By including design patents in your FTO analysis, you can:

• Identify design patent risks
• Assess infringement likelihood
• Develop effective mitigation strategies
• Avoid costly design patent litigation

For companies in consumer-facing industries, design patent analysis is as important as utility patent analysis.

Key Takeaway: Design patents protect product appearance and can pose significant FTO risks. Include design patents in your FTO analysis, conduct visual comparison, and develop mitigation strategies for high-risk patents.