Every claim element, mapped to the evidence.
A claim chart is where a patent case is won or lost. We break each claim into its elements and map every one to evidence in a product, a standard or a prior art reference, with sources cited, so courts, examiners and licensees can follow the argument at a glance.
- Infringement, invalidity and SEP charts, built for the forum you are in
- Sourced evidence: text, figures and screenshots, cited and dated
- Attorney-reviewed before it reaches your counsel
Request a claim chart quote
Share the patent and the product or prior art. An attorney replies within one business day with scope, timeline and fees.
The document that turns a patent into an argument.
A claim chart is a table that sets each element of a patent claim beside the matching evidence: a feature in an accused product, a section of a standard, or a passage in a prior art reference. It turns dense claim language into a clear, element-by-element comparison that anyone can follow.
Patent owners use claim charts to show infringement. Defendants use them to show that a product lacks an element, or that prior art disclosed the invention first. Either way, the chart is only as strong as its weakest element, so every limitation must be accounted for.
At a glance
- Also called
- Claim mapping, evidence-of-use chart (EoU)
- Maps
- Claim elements to a product, standard or prior art
- Used by
- Patent owners, defendants, counsel, licensors
- Used in
- Litigation, IPR, oppositions, licensing, M&A
- Evidence
- Text, figures, screenshots, test results
- You receive
- Attorney-reviewed chart in your format
Clear enough for a licensee, rigorous enough for a court.
Every element is numbered, every piece of evidence is cited, and every gap is flagged honestly, so there are no surprises later.
| Ref | Claim element | Evidence in the product | Status |
|---|---|---|---|
| 1[pre] | A wireless charging device, comprising: | “YOUR BRAND Charger is a wireless charging pad for phones and earbuds.”Product page, accessed 12 Mar 2026 | Present |
| 1[a] | a housing having a charging surface; | Figure 2 of the user manual shows the top charging surface of the housing.User manual, p. 4, Fig. 2 | Present |
| 1[b] | a transmitter coil positioned beneath the charging surface; | Teardown images show a copper coil directly beneath the top cover.Public teardown, image 3 | Present |
| 1[c] | a sensor configured to detect the position of a receiver device; and | Datasheet lists “foreign object and device position detection”.Datasheet v1.2, §3.1 | Present |
| 1[d] | a controller that adjusts power based on the detected position. | No public document confirms power is adjusted by position. Testing recommended.Gap: further evidence needed | Gap |
A simplified, fictional example. Real charts include annotated figures and screenshots, and are formatted for the court, office or licensing programme you specify.
The right chart for every side of a dispute.
Whether you are asserting a patent, defending against one or valuing a portfolio, we build the chart around the question you need answered.
Infringement (evidence of use)
Claims mapped to an accused product or process, for demand letters, complaints and licensing.
Invalidity
Claims mapped to prior art references and combinations, for contentions, IPR and oppositions.
Non-infringement
Missing elements shown clearly, to answer an assertion or support a freedom to operate opinion.
Standard essential patents
Claims mapped to sections of a standard, then to products that implement it.
Licensing and valuation
Portfolio-level charts that support royalty discussions, sales and due diligence.
Chart review
A second opinion on charts prepared by others, with gaps and weaknesses identified.
From claim language to a chart counsel can file.
A structured process keeps every element accounted for and every source traceable.
- 01
Claim parsing
Claims split into numbered elements.
- 02
Construction
Key terms read against the specification and file history.
- 03
Evidence gathering
Product, standard or prior art evidence collected and preserved.
- 04
Mapping
Each element matched to cited, annotated evidence.
- 05
Attorney review
Gaps, risks and alternative readings flagged.
- 06
Delivery
Formatted for your court, office or licensing programme.
A chart that overstates the evidence fails at the worst moment. We flag every element where evidence is thin and suggest how to close it, whether by testing, further search or a different claim.
Request a claim chart quoteWhat you receive, and where it is used.
Charts are delivered in Word or Excel, ready to drop into pleadings, petitions and licensing decks.
What each chart includes
Built to be checked, not just read.
- Claim elements numbered and quoted in full
- Construction applied to key terms
- Evidence quoted with page, figure or timestamp
- Annotated figures and screenshots
- Source list with dates, links and preserved copies
- Status for every element: present, absent or gap
- Attorney notes on risks and alternative readings
- Formatting to your court or office requirements
How clients use it
In the forum that matters to you.
- Infringement complaints and contentions
- Invalidity contentions and expert reports
- IPR, post-grant review and oppositions
- Demand and notice letters
- Licensing and SEP programmes
- Settlement negotiations
- Portfolio valuation and M&A diligence
- Internal assertion and risk reviews
Technical depth in the fields shaping what comes next.
Our attorneys and technical specialists work in the technologies where filing activity is growing fastest, so every chart is built by people who understand the technology.
Artificial intelligence & ML
Models, training methods and AI applicationsSemiconductors
Chip design, fabrication and packagingTelecom, 5G & IoT
Wireless standards, networks and connected devicesElectric vehicles & mobility
Batteries, charging and drive systemsClean energy & climate tech
Solar, storage, hydrogen and carbon captureRobotics & automation
Industrial robots, control and machine visionMedical devices & digital health
Devices, diagnostics and health softwareBiotechnology & genomics
Biologics, gene editing and sequencingPharmaceuticals
Formulations, processes and new usesFintech & digital payments
Payments, security and financial platformsConsumer electronics & wearables
Devices, sensors and user interfacesAdvanced materials & chemistry
Materials, polymers and chemical processesCharts that hold up under cross-examination.
Engineers, scientists and patent attorneys build every chart together, so the technical mapping and the legal reading agree.
Attorney-reviewed
Every chart checked for construction, gaps and risk before delivery.
Technical depth
Specialists who read code, circuits, standards and biologics.
Any forum
Formatted for US courts, the PTAB, the EPO, the UPC and licensing.
Rich evidence
Text, figures, screenshots and test data, annotated and cited.
Built to your deadline
Charts planned around court dates and negotiation timelines.
Confidentiality
Strict non-disclosure protocols, and work structured to support privilege with your counsel.
Questions about claim charts.
Short answers to what counsel and IP teams ask us most.
Need a chart built?
Send us the patent and the product or prior art. We will reply with a quote within one business day.
Request a claim chart quote01What is a patent claim chart?
A table that maps each element of a patent claim to matching evidence in a product, a standard or a prior art reference. It is the core document in infringement, invalidity and licensing work.
02What is the difference between an infringement and an invalidity chart?
An infringement chart maps claims to an accused product to show it uses the invention. An invalidity chart maps claims to prior art to show the invention was already known or obvious.
03What is an evidence-of-use (EoU) chart?
Another name for an infringement claim chart, used especially in licensing. It shows how a product meets each claim element, with evidence cited.
04Can I prepare a claim chart myself?
A simple chart can help internal discussion. For litigation, post-grant proceedings or licensing, a professionally prepared and attorney-reviewed chart is far more persuasive and less likely to fail under scrutiny.
05What format do you deliver in?
Usually Word or Excel, formatted to your court, office or licensing programme. We can also follow your firm's template.
06What if evidence for an element cannot be found?
We flag it as a gap and recommend how to close it, such as product testing, further search or charting a different claim. We never overstate the evidence.
07How long does a chart take?
It depends on the number of claims, the complexity of the technology and the evidence available. We confirm a timeline and fee before work starts.
Every element mapped, every source cited.
Share the patent and the product or prior art. An attorney will reply within one business day.