Matthew I. Kreeger's practice has focused on complex litigation matters, with an emphasis on patent litigation and interference matters, along with other intellectual property disputes. He has served as lead or co-lead counsel in several patent interferences, and is the co-chair of the firm’s patent interference practice group. Mr. Kreeger also frequently advises clients on patent prosecution and pre-litigation strategy issues.

Mr. Kreeger recently served as co-lead counsel and successfully argued the final hearing before the Board of Patent Appeals and Interferences in a major interference between Chiron Corporation and the National Institutes of Health. In October 2002, the Board issued a 124-page decision finding that Chiron's inventors were entitled to a patent on a blood screening diagnostic for HIV, and rejected the NIH's position.

Mr. Kreeger joined Morrison & Foerster's Litigation Department in 1991, and became a partner in 1998. He also has over ten years of experience as a consultant in software design and development.

• Represented Chiron in dispute with Genentech over a method for inducing baker's yeast to secrete human insulin-like growth factor. After a court trial and appellate decisions, the Federal Circuit confirmed Chiron inventors were entitled to priority.
• Served as lead counsel in Gregory v. Tsui, a patent interference relating to cystic fibrosis regulatory protein.
• Represented Novell in successful defense of patent infringement suit by France Telecom. The case was voluntarily dismissed after claim construction.
• Celltech and Genentech had a lengthy interference dispute over basic antibody expression patents. Represented the litigation over the appeal of the interference decision, resulting in a favorable settlement.
• Served on the trial team representing Chiron Corporation in an infringement action against Abbott Laboratories concerning immunoassays and DNA probes.