Robert Bosch LLC v. Westport Fuel Systems Canada Inc.

Summary

The court affirmed the Board’s determination that Bosch failed to prove the challenged patent claims obvious. Substantial evidence supported the Board’s finding that the prior-art reference disclosed a flexible membrane that would flex during actuation, inconsistent with the claimed hydraulic fluid acting substantially as a solid with substantially constant thickness. The court also rejected Bosch’s alternative evidentiary, credibility, petition-scope, and procedural arguments.