Navigating different types of patent infringement

Do you have a patent and think someone is infringing on it? Or are you worried you may be infringing on someone else's patent? Read on to better understand your rights and avoid potentially costly litigation.

by River Braun, J.D.
updated February 07, 2023 ·  3min read

Patent infringement comes in a variety of forms, from direct to indirect, willful to induced, and others in between. The key similarity between all of these is the use of a protected idea, design, or device without the patent holder's permission.

Defining patent infrinngement

Federal law governs and protects patents. The definition of patent infringement can be found in 35 U.S.C. 271(a):

“[W]hoever without authority makes, uses, offers to sell, or sells any patented invention, within the United States or imports into the United States any patented invention during the term of the patent therefor, infringes the patent."

In simpler terms, infringement occurs when someone uses a patent without authorization. Because the term "use" is particularly troublesome in this field of litigation, it is wise to seek the advice of a trained intellectual property attorney before attempting to use someone else's patent without approval.

Types of patent infringement

Patent infringement is not always as clear as you might think. Understanding the different types can help you determine whether your work has been infringed upon.

  1. Direct infringement involves the production, use, sale, attempt to sell, or importing of any patented item without first obtaining a license from the patent holder. To succeed in a case against a direct infringer, you must be able to prove that the defendant completed these acts willfully and within the U.S.
  2. Indirect infringement occurs when an individual or business is infringing on a patent but is not the original company or individual to do so. For example, Acme industries designs an anvil that is exactly like your patented anvil design. Acme sells its anvils to Beta Surplus in the U.S., who sells them for distribution. While you can sue Acme for direct infringement, you might sue Beta Surplus for indirect infringement.
  3. Contributory infringement occurs when an individual or company purchases or imports a part that goes into creating the patented product. In order to succeed in a case against a would-be contributory infringer, you must be able to show that the main use of the part purchased or imported is used to create your product. A part that is merely generic with multiple potential uses is not sufficient.
  4. Willful infringement involves someone showing a serious disregard for the existence of a patent. For example, if you sued Acme for infringing on your anvil patent and found during discovery that they had it in their possession and used it to make their anvils, you will likely prevail in showing that their violation was willful. Those found guilty of willful infringement pay higher penalties, attorney fees, and court costs.
  5. Induced infringement occurs when a person aids another infringer by providing parts or assisting in the manufacture of the patented item. Actions that may fall into this category include providing instructions, plans, or processes.

Patent infringement and statutes of limitation

Like all causes of action, infringement cases have a time limit, also called a statute of limitations, on when you can sue for damages. Patent laws allow plaintiffs to collect damages on up to six years of activity.

Unlike other statutes of limitation, where the countdown clock starts when the harm occurred, such as the typical one-year statute of limitations following a car accident, the clock in a patent infringement case runs backward from the time the case is filed. This means that you could, conceivably, discover someone infringing on your patent and wait to sue them. While this seems counterintuitive, if they are particularly great at marketing, it may be in your best interests to take the ball and run with it. The net effect could be more damages in your pocket.

It is your duty to enforce your patent by keeping a close eye on the market to ensure no one is using your protected work without your permission. If you encounter someone infringing on your work, contact them and demand that they cease the infringing activities and perhaps, if it is in your best interests, offer to negotiate a license.

If you are concerned that you might be infringing on someone else's patent or if you are ready to protect your own intellectual property, consult with an online service provider to discuss your product and its potential for infringement.

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River Braun, J.D.

About the Author

River Braun, J.D.

River Braun was a business attorney in California for over a decade, assisting entrepreneurs on issues such as incorpora… Read more

This portion of the site is for informational purposes only. The content is not legal advice. The statements and opinions are the expression of the author, not LegalZoom, and have not been evaluated by LegalZoom for accuracy, completeness, or changes in the law.