Christopher Francis
Principal author, The Claims Interpreted Report

Means-Plus-Function Construction Can Lead to Indefiniteness

In Unicorn Global Inc. v. Golab, Inc. No. 3:19-CV-0754-N (N.D. Tex. May 26, 2020), the Northern District of Texas construed several disputed terms of U.S. Patent No. 9,376,155 and U.S. Patent No. 9,452,802, and found claims to be… Read More

Federal Circuit Uses Claim Construction to Overturn Lack of Enablement: McRO v. Bandai Namco

In its second time considering a patent, the Federal Circuit upheld the district court’s ruling on noninfringement but overturned its ruling of lack of enablement in McRO v. Bandai Namco. The decision rested on the claim constru… Read More

Lack of Algorithm in Specification Renders Means-Plus-Function Claim Indefinite

The Eastern District of Texas held that the only asserted claim of U.S. Patent No. 6,452,515 was indefinite because “the term ‘[means] for encoding these labels in a random order’” (alterations in original) invokes 35 USC… Read More

When Are Preambles Limiting?

In his recent article Without Preamble, Stanford professor Mark Lemley surveys the morass of law on determining when patent claim preambles are limiting, and he predicts that it will be swept away if the Supreme Court ever faces t… Read More

Claim Interpretation and Definiteness of Terms of Degree

In Kitsch LLC v. Deejayzoo, LLC (Case No. LA CV19-02556 JAK (RAOx)) the Central District of California interpreted claims of U.S. Patent No. 10,021,930 that included terms of degree as being sufficiently definite under 35 U.S.C. … Read More

CAFC: Obviousness and Non-Limiting Reference Numerals in Claims: Grit Energy Solutions, LLC v. Oren Technologies, LLC.

The Federal Circuit, in vacating the Patent Trial and Appeal Board’s (PTAB) decision in an inter partes review (IPR) that claims in a patent were not obvious, held that, for an obviousness inquiry, reference numerals in the clai… Read More

EDTx Hands Down Indefiniteness Ruling in Semcon v. TCT Mobile

The Eastern District of Texas recently issued a claim construction ruling with a couple interesting rulings on indefiniteness in the case of Semcon IP v. Louis Vuitton and TCT Mobile (April 29, 2020). TCT Mobile is a mobile commun… Read More

Is Inconsistency Indefiniteness under 35 U.S.C. § 112? TVnGo Ltd. V. LG Electronics, Inc.

Claims of five patents directed to toggling between television and Internet content have been held invalid under 35 U.S.C. § 112(b) based on indefiniteness of claim terms directed to content “overlays” on a display screen. TV… Read More

Prior Art Anticipates Claims because “A” means “One or More”

The Central District of California held that claims directed to “‘an induction actuated container which is capable of automatically opening when a user is approaching, and automatically closing when the user has left’” are… Read More

Claim Interpretation and the Enablement Requirement

Providing a reminder about how to interpret elements of a patent claim when analyzing the claim against prior art during patent prosecution, in Technical Consumer Products, Inc. v. Lighting Science Group Corp. (April 8, 2020), the… Read More