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A claim chart is used to show how a product (or a service) has infringed on a patent. The patent owner must show infringement on every portion of the claims.5 min read
Claim Charts: What Are They?
A claim chart is used to show how a product (or a service) has infringed on a patent, typically a utility patent. To prove the case, the patent owner must show that the product or service in question infringes on every portion of the claims. Claim charts break down complicated claims into easily read arguments that both parties can use when deciding a case. They also make it easier to compromise and negotiate with the other side.
The claim chart breaks down a claim by its specific elements. It doesn't have to cover the entire patent claim, and can only focus on the parts of the claim that are valid. Most lawyers agree that the claim chart is only as good as the claims that it contains. If it does not contain all the claim language, a court cannot determine whether infringement has taken place.
Claim charts have multiple names. Within a court of law, prosecutors might refer to them as:
infringement contentions (ICs)
preliminary infringement contentions (PICs)
While they go by many names, claim charts have been required with court submissions since the 1983 case of Summagraphics Corporation v. U.S..
There are differnt types of claim charts. Generalized ones are typically used in licensing strategies. More sophisticated charts are used to demonstrate infringement and to determine possible interpretations of the claims when legal teams prepare to file a lawsuit.
Why are Claim Charts Important?
Claim charts make it easy for people in the courtroom to understand what patents are being violated. Between technological and medical inventions, patents are becoming more complicated. This means court members need to fully understand the products before they can decide which side wins the case. Claim charts make it easy to learn about the different industry jargon before sitting through a case.
The modern criteria that a claim chart needs to prove that a claim was violated and a patent was infringed upon. Each claim chart needs to explain:
Which specific claims have been infringed
Which products or processes did the defendant make from the patent
Exactly where each element of the claim is found in the defendant's products
For example, an inventor might patent a motor that sits in the back of a machine and pumps out air. The legal team would need to find a company that used the same (or similar) motor design in the same way that the inventor intended. If they can't prove this, then the patent use might just be coincidence instead of a violation.
Reasons to Consider Using Claim Charts
Claim charts aren't just for the prosecution's use in trying to prove that another company stole the plaintiff's idea. They're also invaluable for the defense. A company that has been accused of stealing an idea can use claim charts to prove that it did not take someone else's ideas.
These charts can also keep infringement claims out of the courtroom. Claim charts open up the idea of negotiations, and a company might use them to negotiate a patent claim. Instead of a lengthy trial or expensive payout, both parties may be happy to make compromises and come to a settlement based on their own needs.
Claim charts strengthen overall litigation efforts. Well-written claim charts can help you win cases, which can set a precedent against any future claims. As you take on multiple cases and push companies into negotiations, you can use past precedents to win your case.
Examples of Claim Charts
For those who are new to the claims process, every claim chart should be two columns wide and several rows deep. In each of the rows in the first column, you would break down different elements of the patent so that you could defend which parts had been infringed.
Once this chart is created, both legal teams will go line-by-line to prove that the item described is in fact what the claim says it is and that it's a violation of the patent.
Naturally, this is just one example of a claim chart, and there are other options that your legal team would choose to follow instead. However, there are common threads in every claim chart. Here is the information every claim chart needs:
A diagram breaking down the claims and what is contested
Elements of the claim that make up the patent
Patent integers (or the number associated with the patent)
Parts of the product or machine that have been violated
Details proving that the parts were taken from the patent and used by the defendant
Oftentimes it's not enough to prove that the parts are similar in order to win the case. The plaintiff needs to prove that the other party directly stole his or her idea and used it to make a profit.
Common Mistakes with Claim Charts
The use of claim charts in court date back to 1937, where the plaintiffs of Christensen v. Bragg-Kliesrath Corporation used charts to easily interpret the different claims and how they had been violated. The charts and in-depth analysis actually lead the plaintiffs to drop the case so they could add more claims to the patent. In the past 80 years, legal teams have become smarter about the claim charts they create, but there's still room for error within them.
One of the main risks that come with drafting claim charts is that you could create something that's too broad. One great example of a claim chart that was too broad: The patent was for a motorcycle and claimed that any vehicle with the following specifications would qualify as a motorcycle:
A transmission attached to at least one wheel
A transmission meant to use energy to rotate at least one wheel
While the above criteria certainly describes a motorcycle, it also describes a moped and a motor scooter. The inventor would be hard pressed to prove that all three of those vehicles were the same and were covered by his patent. This is what happens when the claim chart is too broad.
Another mistake is including all the details in one paragraph. Should the claim run into the hundreds of words, single words that could be significant to the claim might be overlooked.
Companies that are unfamiliar with the claims process should Post your legal need here to get free custom quotes from the top 5% of lawyers on creating a claim chart. A lawyer's expertise should make it easier to create compelling pieces of evidence that can help your business win claims.