David B. Fisch

David B. Fisch is an attorney whose patent litigation practice, primarily conducted at the now-defunct Fisch Sigler LLP, centered on complex technological disputes. His work as Lead Counsel in a significant case highlights his focus on representing plaintiffs in high-stakes intellectual property matters.

During his tenure at Fisch Sigler LLP, which concluded its formal operations on December 31, 2024, Mr. Fisch served as Lead Counsel in Western Digital Technologies, Inc. et al. v. Viasat, Inc.. This case involved patents related to flash memory, error correction, digital rights management systems, and secure stream buffers on network-attached storage. The litigation saw Western Digital successfully challenge the validity of Viasat's patent through an inter partes review (IPR) proceeding, with the Patent Trial and Appeal Board (PTAB) finding Viasat's claims unpatentable for obviousness, a decision later affirmed by the Federal Circuit. This favorable IPR outcome for his client contributed to the voluntary dismissal of the district court case.

While only one case is tracked, his role as Lead Counsel at Fisch Sigler, a firm known for handling high-tech and high-stakes intellectual property matters, suggests a practice dedicated to sophisticated patent disputes. The nature of the Western Digital case demonstrates experience in semiconductor and data storage technologies, and the strategic interplay between district court litigation and PTAB proceedings.

Specific details regarding Mr. Fisch's bar admissions and education could not be reliably and uniquely sourced to this particular patent litigation attorney given the commonality of the name and the closure of his former firm. His current professional affiliation following the cessation of Fisch Sigler's operations is also not publicly available.