Mark J. Stewart

Mark J. Stewart serves as in-house counsel, specializing in patent litigation within the biotechnology and pharmaceutical sectors. His practice centers on defending intellectual property related to biopharmaceutical innovations, particularly those involving drug delivery systems and hyaluronidase enzymes, aligning with Halozyme Inc.'s core business.

In his in-house capacity at Halozyme Inc., Mr. Stewart has been involved in proceedings where the company's patents are challenged. His tracked appearance is in Unified Patents LLC v. Halozyme Inc. The involvement of Unified Patents LLC, an organization known for initiating inter partes review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB), indicates Mr. Stewart has experience in PTAB/IPR challenges, typically representing patent owners in a defensive role against patent validity assertions.

While the provided case list indicates a "plaintiff side" appearance for Mr. Stewart, his role as in-house counsel for Halozyme Inc. in a challenge from Unified Patents LLC generally positions him on the side defending the patent owner's interests.

Publicly available professional background details, including specific bar admissions and educational institutions for Mark J. Stewart in this capacity, are not readily available in well-sourced records. It is important to note that web searches for "Mark J. Stewart patent attorney" identify other attorneys with similar names and distinct professional profiles. For instance, a Mark Stewart serves as VP, Head of Global IP Litigation for Merck Sharp & Dohme LLC (MSD) and is involved in litigation against Halozyme, indicating this is a different individual.