W. Karl Renner

W. Karl Renner is a Principal at Fish & Richardson in Washington, D.C., where he is the leader of the firm's Post-Grant Practice. His work is heavily concentrated on administrative proceedings before the Patent Trial and Appeal Board (PTAB), including inter partes review (IPR) and post-grant review (PGR). He has been involved in over 900 post-grant matters, representing both patent owners and challengers. His technical focus is broad, covering electrical, computer-related, physics, and mechanical arts. This includes extensive experience in technologies such as internet applications, network systems, data storage, microprocessors, mobile communications, and semiconductors.

While the provided case list shows a single appearance for a plaintiff in district court litigation, Renner's practice is overwhelmingly centered on PTAB proceedings, which often run parallel to district court cases. He is recognized as one of the nation's leading and most active PTAB practitioners, frequently representing petitioners challenging patent validity. His work often involves advising on defensive tactics against competitor IP and coordinating PTAB strategy with ongoing litigation. Renner is a founding director and past president of the PTAB Bar Association.

Renner has spent his career at Fish & Richardson, where he also serves on the firm's management committee. He is frequently recognized as a leading attorney for post-grant proceedings by publications such as Managing Intellectual Property and Chambers USA. His extensive experience is reflected in numerous publications and speaking engagements focused on PTAB practice and strategy.

Education and bar admission information for W. Karl Renner is not consistently available in the sources reviewed. Prior to his legal career, he gained engineering experience at the U.S. Department of Energy.