L. F. Strassheim Company, a Wisconsin Corporation, D/B/A Bowling Green Chair Co. v. Gold Medal Folding Furniture Company, a Wisconsin Corporation

STEVENS, Circuit Judge.

The principal question is whether the district court properly found that newly discovered evidence, which plainly required an earlier judgment of patent validity to be set aside, was not sufficient to prove that the patentee had fraudulently concealed the invalidating prior public use of the invention. We accept the district court’s credibility determinations but disagree with its appraisal of the legal consequences of the patentee’s serious lack of diligence in connection with its patent application and in responding to relevant pretrial discovery requests. We…