On July 10, 2019, the Federal Circuit issued two precedential opinions appealing decisions from the Patent Trial and Appeal Board addressing written description and jurisdiction.

Quake v. Lo, Docket No. 18-1779 (CAFC July 10, 2019) - http://www.cafc.uscourts.gov/sites/default/files/opinions-orders/18-1779.Opinion.7-10-2019.pdf
U.S. Patent No. 8,008,018
https://patents.google.com/patent/US8008018B2
U.S. Patent Pub. No. 2009/0170114, publication of U.S. App. No. 12/393,833
https://patents.google.com/patent/US20090170114A1

General Electric Co. v. United Technologies Corp., 17-2497 (CAFC July 10, 2019) - http://www.cafc.uscourts.gov/sites/default/files/opinions-orders/17-2497.Opinion.7-10-2019.pdf
U.S. Patent No. 8,511,605
https://patents.google.com/patent/US8511605B2