What is a Claim Chart?
Everything you need to know about claim charts—types, structure, use cases, and how AI is automating element-by-element mapping.
Definition
A claim chart is a document that maps each element of a patent claim to specific evidence showing that a product or process practices that element. Claim charts are foundational tools in patent licensing, litigation, and portfolio valuation.
How a Claim Chart Is Structured
A claim chart is typically organized as a two-column table. The left column breaks a patent claim into its individual elements. The right column provides corresponding evidence—product documentation, source code, or prior art references—demonstrating each element is met.
Types of Claim Charts
- Infringement Claim Charts: Map claim elements to an accused product to show infringement
- Invalidity Claim Charts: Map claim elements to prior art to challenge patent validity
- Freedom-to-Operate Charts: Analyze whether a planned product would infringe existing patents
Where Claim Charts Are Used
In **licensing**, they demonstrate patent strength against a target product. In **litigation**, they are required as part of infringement contentions. In **portfolio valuation**, they assess which patents have strong reads against market products.
How AI Automates Claim Charting
Manually creating a single claim chart can take 10-20 hours. AI-powered tools accelerate this by automatically parsing claims, identifying evidence sources, and generating draft element-by-element mappings in minutes.
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