WASHINGTON, D.C. - The U.S. Patent and Trademark Office (PTO) Board of Patent Appeals and Interferences (BPAI) failed to consider "a wealth of well-documented knowledge that is highly material to evaluating" a motivation to combine four prior art references in the re-examination of a movable bulkhead patent, the Federal Circuit U.S. Court of Appeals held Oct. 30 (Randall Mfg. v. Teresa Stanek Rea, Acting Director, U.S. Patent and Trademark Office and FG Products Inc., No. 12-1611, Fed. Cir.).