Kenneth J. Sigler

Kenneth J. Sigler is a patent litigation attorney with a practice focused on complex technology disputes, notably in areas such as digital rights management, network attached storage, and flash memory technologies. While the precise full name "Kenneth J. Sigler" could not be definitively linked to all publicly available professional profiles, "Bill Sigler," a nationally recognized patent litigator, was a named partner at Fisch Sigler LLP and is currently the Managing Partner at LexArx PLLC. Fisch Sigler LLP concluded formal operations on December 31, 2024.

Sigler's practice, particularly at LexArx PLLC, emphasizes challenging assertions and patents, with a focus on neutralizing NPE (Non-Practicing Entity) and SEP (Standard Essential Patent) threats. His firm's services include district court litigation, reexaminations, Federal Circuit appeals, and licensing negotiations. His experience includes representing plaintiffs, as seen in Western Digital Technologies, Inc. et al. v. Viasat, Inc., a case involving patents related to digital rights management and secure stream buffers on network attached storage. The district court patent infringement dispute in this matter concluded with a voluntary dismissal. Relatedly, in Viasat, Inc. v. Western Digital Technologies, Inc., the Federal Circuit affirmed the Patent Trial and Appeal Board's (PTAB) decision that certain Viasat flash memory patents were unpatentable for obviousness.

Sigler demonstrates significant experience in Patent Trial and Appeal Board (PTAB) proceedings, with LexArx PLLC actively engaging in reexaminations and other validity challenges. The firm has successfully obtained reexamination requests on behalf of clients like HPE. Information regarding Kenneth J. Sigler's specific legal education and bar admissions was not reliably sourced in the available public records.