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Function-Way-Result Test

MoFo Life Sciences

Practical Strategies For Protecting Innovations Under The Doctrine Of Equivalents

MoFo Life Sciences on

Recent case law highlights enablement and written description challenges for genus claims. Given the challenges of enforcing genus claims, the doctrine of equivalents (DOE) may become a more important tool for patentees when...more

McDermott Will & Emery

“Tangential Relation” Exception Saves Patentee’s Reliance on DOE

McDermott Will & Emery on

Addressing an infringement determination under the doctrine of equivalents (DOE), the US Court of Appeals for the Federal Circuit found that the “tangential relation” exception to the doctrine of prosecution history estoppel...more

Knobbe Martens

Federal Circuit Finds That a Variant Polypeptide Sequence Infringes Under the Doctrine of Equivalents

Knobbe Martens on

Ajinomoto Co., Inc. vs. CH Cheiljedang Corp. (2018-1590, 2018-1629) - In a pair of cross-appeals from the International Trade Commission, the Federal Circuit affirmed the Commission’s ruling that one of CJ CheilJedang...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

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

McDermott Will & Emery

The Right Test for Evaluating Equivalence in Chemical Cases

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

Foley & Lardner LLP

Court Questions Applicability of Function Way Result Test In Chemical Cases

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

Foley & Lardner LLP

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

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

Patterson Belknap Webb & Tyler LLP

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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