A claim chart sets a patent claim beside the evidence, element by element, in a table that a judge, licensee or board can follow. It is the standard tool for proving infringement. It is also used to challenge validity against prior art, to value a patent before a transaction, to compare competing portfolios and to explain a patent's significance to stakeholders. A chart is only as strong as its evidence and the accuracy of its mapping, which is where most of the work lies.

What We Offer

• Infringement (evidence-of-use) charts mapping claims to products, services or processes.

• Invalidity charts mapping claims to prior art references.

• Standard-essential patent (SEP) charts mapping claims to technical standards.

• Portfolio charts comparing a patent portfolio with a competitor's product range.

• Charts for licensing, valuation and M&A, showing the scope and relevance of a patent to current products.

Our Approach

1. Construe the claims. We study the patent and its prosecution history to fix the scope of each claim, focusing on the broadest independent claim.

2. Identify the targets. Using classification codes, cited patents and market research, we identify products launched after the priority date in jurisdictions where the patent is in force.

3. Gather the evidence. We use the best available source for each element: data sheets and product documentation, technical standards, source code, teardown reports or reverse engineering.

4. Map each element. Every claim element is mapped to dated, verifiable evidence. Where a feature is not literally present, we assess whether it is met by an equivalent.

5. Review for objectivity. Each chart is reviewed so it holds up when tested by the other side.

Why Khurana & Khurana

• Technical depth across fields. Charts are prepared by patent attorneys and engineers in chemistry, biotechnology, pharmaceuticals, electronics, electrical engineering, software and mechanical engineering.

• The right evidence for the technology. We know when a chart needs source code review, a teardown or reverse engineering, and how to obtain it.

• Built to be used. Our charts are prepared for real negotiations and litigation: legally sound and easy for non-specialists to follow.

Need claim charts for licensing or litigation?

Contact us at info@khuranaandkhurana.com, and tell us the patents and the targets. We will scope the evidence needed and the timeline.