News & Analysis as of

Means-Plus-Function Patent Litigation Expert Testimony

McDermott Will & Emery

Bottling the Truth: Equivalence and Reverse Equivalence

McDermott Will & Emery on

The US Court of Appeals for the Federal Circuit ruled that the “substantially the same way” comparison in connection with a doctrine of equivalents (DOE) analysis involving a means-plus-function claim limitation should focus...more

Downs Rachlin Martin PLLC

Means Plus Function – Williamson Removed The “Heavy” Presumption But Dyfan And VDPP Pack Some of the Pounds Back On

When a claim term is construed as a means plus function limitation, the recited “means” is limited to only the specific structures disclosed in the specification for performing the recited function, and a limited range of...more

Morrison & Foerster LLP - Federal Circuitry

One Last look at Patent Cases in January

Last week wrapped up a busy January for the Federal Circuit. Oral arguments returned to a telephonic format, and arguments next month will be by video (although still audio-only for the public). As the month is now in the...more

Knobbe Martens

Federal Circuit Review - September 2018

Knobbe Martens on

Federal Circuit Finds Claims Issued from Reexamination Co-Pending with Appeal Ineligible Where the Changes Did Not Affect Section 101 Eligibility - In SAP AMERICA, Inc. v. InvestPic, LLC, Appeal No. 2017-2081, the...more

McDermott Will & Emery

“Mechanism” Claim Term Found to Be an Indefinite Means-Plus-Function Element - Media Rights Techs. v. Capital One Financial Corp.

McDermott Will & Emery on

Addressing whether a claim term was a means-plus-function term under the pre-America Invents Act (AIA) 35 U.S.C. § 112 ¶ 6, the U.S. Court of Appeals for the Federal Circuit construed the disputed term as a...more

Proskauer - New England IP Blog

Federal Circuit Revisits and Recasts Means-Plus-Function Claim Interpretation

An en banc decision from the Federal Circuit last week overruled a line of cases governing the interpretation of functional claim language, calling into question how courts, the PTO, and industry will treat such language in...more

Kelley Drye & Warren LLP

Federal Circuit Defers To District Court’s Factual Finding That “Voltage Source Means” Connotes Sufficient Structure To Avoid...

Today, the Federal Circuit issued a ruling in Lighting Ballast v. Philips on remand from the Supreme Court after the Teva decision changed the standard of review of a district court’s claim construction. One of the more...more

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