On June 21, 2019, the Federal Circuit issued a precedential opinion regarding patent law: Kolcraft Ent. v. Graco Children's Products. The court addressed evidence of prior conception in an IPR proceeding.

Kolcraft Enterprises, Inc. v. Graco Children’s Products, Inc., Docket No. 2018-1259 (CAFC July 2, 2019) - http://www.cafc.uscourts.gov/sites/default/files/opinions-orders/18-1259.Opinion.7-2-2019.pdf

U.S. Patent No. D604,970 - https://patents.google.com/patent/USD604970S1
U.S. Patent No. D616,231 - https://patents.google.com/patent/USD616231S1