Patent Case Watch

Patent opinions from the Eastern District of Texas and the U.S. Court of Appeals for the Federal Circuit

Fed. Cir.

Puradigm, LLC v. DBG Group Investments LLC, No. 24-2299 (Fed. Cir. Apr. 1, 2026)

Affirmed
Summary Judgment Non-Infringement Prosecution History Estoppel
Court
U.S. Court of Appeals for the Federal Circuit
Case No.
No. 24-2299
Decided
April 1, 2026
Judge
Prost, J.
Document
Nonprecedential Opinion
Length
12 pages

From the Opinion

The passage below is extracted verbatim from the opening of the document. It has not been editorially summarized — consult the full opinion for the court's complete reasoning.

Puradigm, LLC (“Puradigm”) sued defendants-appel- les, including DBG Group Investments LLC (“DBG”), in the U.S. District Court for the Northern District of Texas for infringing U.S . Patent No. 8,585,979 (“the ’979 patent”). The district court found the scope of the ’979 patent to be limited by prosecution history disclaimer and granted sum- mary judgment of noninfringement. Puradigm, LLC v. DBG Grp. Inv s., LLC, No. 3:23-cv-216, 2024 WL 3997489, at *10 (N.D. Tex. Aug. 29, 2024). For the follow- ing reasons, we affirm.

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Source: govinfo.gov USCOURTS collection · retrieved July 23, 2026 · Report an error