Nolo's Plain-English Law Dictionary

Legal Dictionary Home

Need Professional Help? Talk to a Lawyer

Enter Your Zip Code to Connect with a Lawyer Serving Your Area

searchbox small
Doctrine Of Equivalents
A form of patent infringement that occurs when an invention performs substantially the same function in substantially the same manner and obtains the same result as a patented invention. As a result of a Supreme Court decision, the doctrine of equivalents must be applied on an element-by-element basis to the patent claims. (See also: patent claims)
LA-NOLO2:DRU1.6.5.2.20150423.31928