( October 16, 2025, 10:41 AM EDT) -- WASHINGTON, D.C. — A Wisconsin federal judge was wrong to apply issue preclusion based on prior findings from the U.S. Patent Trial and Appeal Board (PTAB) when granting summary judgment in a patent infringement dispute over eyeglass lens patents, a Federal Circuit U.S. Court of Appeals panel held Oct. 15; the panel said the PTAB findings relied on by the judge came under a different standard of proof than that required for district courts....