Patent Case Watch

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

Fed. Cir.

Roland Corporation v. inMusic Brands, Inc., No. 23-1327 (Fed. Cir. Mar. 27, 2025)

Affirmed in Part
Infringement Daubert / Expert Challenges JMOL / Post-Trial Damages
Court
U.S. Court of Appeals for the Federal Circuit
Case No.
No. 23-1327
Also Docketed
No. 23-1401, No. 23-1564, No. 23-1565 (consolidated; same document)
Decided
March 27, 2025
Judge
Chen, J.
Document
Nonprecedential Opinion
Length
40 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.

Roland Corporation (Roland or Roland Japan) sued inMusic Brands, Inc. (inMusic) for infringement of eight patents relating to electronic drums and electronic cym- bals: U.S. Patent Nos. 7,385,135 (’135 patent), 6,921,857 (’857 patent), 6,756,535 (’535 patent), 6,271,458 (’458 pa- tent), 6,121,538 (’538 patent), 6,881,885 (’885 patent), 6,632,989 (’989 patent), and 7,459,626 (’626 patent) (collec- tively, Asserted Patents).

Download Opinion (PDF)

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