Cloudflare Knocks Out Parts of Sable Data Patent at IP Tribunal

Cloudflare Inc. partially won its bid to cancel claims in a Sable Networks Inc. communications patent, when an administrative tribunal ruled that most but not all challenged claims do not deserve patent protection.

In a mixed decision Tuesday, the Patent Trial and Appeal Board said all but four challenged claims in US Patent No. 8,243,593—which covers a mechanism for “identifying and penalizing misbehaving flows in a network"—are invalid in light of previous publications.

Sable Networks and Sable IP LLC sued Cloudflare in March 2021 for allegedly infringing four patents, including the ‘593 patent. Cloudflare then announced a $100,000 “bounty” ...