Wash World Inc. v. Belanger Inc., No. 23-1841 (Fed. Cir. Mar. 24, 2025)

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.

Resolution of this case requires us to consider when a litigant fairly presents an issue to the trial court judge. Ap- pellant-adjudicated infringer Wash World Inc. (“Wash World”) seeks to reverse a final judgment that it infringed Appellee-patentee Belanger Inc.’s (“Belanger”) 8,602,041 patent (the “’041 patent”). Wash World’s principal conten- tions are that the district court erred in connection with construing – or, more accurately, not construing – three claim terms, and that Belanger could not prove inf ringe- ment under the correct constructions.