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Evidence-of-Use (EoU) Claim Charts

Synoptic IP’s Evidence-of-Use (EoU)/claim chart service demonstrates infringement by adhering to the “all elements test,” which is the basis for accusing a product or procedure.

  • 4,000+projects delivered
  • 70+clients
  • 12+years in practice
  • 6 yrsaverage engineer experience

The appropriately constructed claim and claim chart map the elements of the claim to the evidence acquired from the accused product or method.

When Is It Needed?

  • Licensing for patents
  • Patent royalties
  • Demonstrating a patent infringement act
  • Calculations of damages based on sales of infringing goods
  • Confirming the infringement before engaging in any legal action
  • Filing a complaint for patent infringement
  • Establishing infringement in court and making other crucial decisions

Why Synoptic IP?

  • We have experienced experts in the field who contributed to the creation of EoUs
  • We provide EoUs with properly constructed claims
  • We provide claims with a wide range of applications in auxiliary or secondary markets
  • We have good access to commercial reference databases, IEEE scholars, etc.
  • We have global partnerships and reverse engineering ability to enhance claim charts
Client Testimonials

Words From Our Clients

Verified LinkedIn reviews and client correspondence from patent attorneys and in-house IP teams who come back to us project after project.

LinkedIn review
★★★★★

I used Synoptic for a validity search and was pleased with the results. The rates were highly competitive, the deliverable was on time, and the results were as good as (if not better than) other searches I’ve used.

Erin J. FoxErin J. FoxIntellectual Property Counsel · ITWPublic & verified
LinkedIn review
★★★★★

Ankit did a very thorough and professional job on a claim chart assignment for us. He showed great perseverance when things got difficult and was able to get the job done. I would work with him again.

Eric BrownEric BrownIP Consultant · Building Viable Licensing ProgramsPublic & verified
Client email
★★★★★

Thank you — the search was quite helpful. We’ll have your invoice processed promptly.

Patent AttorneyQuarles & Brady · Client since 2018Name withheld
Client email
★★★★★

Thank you for your work on this matter. We were pleased with the search and will consider you for future searches.

Patent AttorneyMerchant & Gould · Client since 2018Name withheld
Client email
★★★★★

We were very pleased with the patentability and FTO report that you produced for us back in November 2024.

Client ContactFrontierBio · Client since 2024Name withheld

Frequently Asked Questions

What is a claim chart?

Claim charts are used to demonstrate how a good or service infringes on a patent. Companies typically use these charts to demonstrate patent infringement by demonstrating the market’s use of a technology.

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Ankit Saxena, Head of Hi-Tech Patent Research at Synoptic IP
Reviewed ByAnkit Saxena Head of Hi-Tech Patent Research

Founder of Synoptic IP with 15 years in prior art research and patent analysis. Ankit reviews the search methodology behind this service.

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