doctrine of equivalents

The Doctrine of Equivalents Fails to Save Patent Infringement Suit: Ethicon Endo-Surgery, Inc., et al, v. Covidien LP

Following a bench trial, the District Court of Massachusetts held that Ethicon’s “shepherd’s hook” design for finger actuation of a forceps is not equivalent to a “finger loop” claimed by Covidien’s patent no. 9,241,… Read More

Patent Infringement: Summary Judgment Fails Under the Doctrine of Equivalents

When is a patent infringement defendant entitled to summary judgment of non-infringement under the doctrine of equivalents?  That question was addressed in CSB-Systems International, Inc. v. SAP America, Inc., No. 10-2156 (E.D. P… Read More