News & Analysis as of

Function-Way-Result Test

Recent Trends on the U.S. Doctrine of Equivalents

U.S. courts have long recognized that a product or process which does not literally infringe a patent can nevertheless infringe under the "doctrine of equivalents" if it is equivalent to the claimed invention. The percentage...more

August 2017: Life Sciences Litigation Update

Mylan Institutional LLC v. Aurobindo Pharma Ltd., No. 2017-1645, 2017 WL 2192945 (Fed. Cir. May 19, 2017). On May 19, 2017, the Federal Circuit issued a precedential opinion in Mylan Institutional LLC v. Aurobindo Pharma Ltd....more

The Right Test for Evaluating Equivalence in Chemical Cases

by McDermott Will & Emery on

The US Court of Appeals for the Federal Circuit affirmed a rare grant of preliminary injunction based on one of three patents in suit, but reversed the injunction as to the other two patents based on the district court’s...more

Court Questions Applicability of Function Way Result Test In Chemical Cases

by Foley & Lardner LLP on

In Mylan Institutional LLC v. Aurobindo Pharma Ltd., the Federal Circuit reviewed a preliminary injunction based in part on a finding of likelihood of success in establishing infringement under the doctrine of equivalents....more

Recent Guidance from the Federal Circuit on the Doctrine of Equivalents in Cases Involving Chemical Compositions

by Foley & Lardner LLP on

In Mylan Institutional LLC, et al. v. Aurobindo Pharma Ltd., et al., Case No. 2017-1645, the Federal Circuit affirmed the district court’s grant of a preliminary injunction as to one of three patents-in-suit, while finding...more

Function/Way/Result Test Causes Headaches in Chemical Cases; Substitute Insubstantial Differences Test

In Mylan Institutional LLC v. Aurobindo Pharma Ltd., [2017-1645] (May 19, 2017), the Federal Circuit affirmed the grant of a preliminary injunction against the infringement of U.S. Patent 9,353,050 on a triarylmethane dye...more

Judge Rakoff Holds a 3-D “Magic Trick” Implemented With Software Is Not Equivalent to One Implemented With Hardware

On April 24, 2016, District Judge Jed S. Rakoff (S.D.N.Y.) ruled that defendants Nintendo Co., Ltd. and Nintendo of America, Inc.’s (collectively, “Nintendo”)’s 3DS pocket gaming console does not infringe Tomita Technologies...more

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