Posts Tagged: "US Patent No. 5287270"

A New Doctrine of Equivalents? CAFC Defines “Use” Under §271

I wonder why we are discussing the definition of “use” under § 271(a) at all. It would seem that the Federal Circuit is potentially broadening the definition of “use” under § 271(a) in a manner that expands direct infringement to start to include those types of things that normally would have been infringement under the doctrine of equivalents. Of course, the Supreme Court in Festo together with the Federal Circuit in Honeywell International Inc. v. Hamilton Sundstrand Corporation have eviscerated the doctrine of equivalents to the point of its non-existence. Perhaps Centillion v. Qwest, NTP and other cases yet to come will breathe new life into the theory under the guise of a direct infringement “use” of a system under § 271(a).