Warren D. Woessner is a registered patent attorney and a founding partner of Schwegman, Lundberg, Woessner and Kluth. His practice focuses on chemical patent law, including biotechnology, pharmaceuticals, vaccines, medical treatments, diagnostics, and agricultural and food chemistry. 

Warren received his B.A. in chemistry (1966) from Cornell University, his Ph.D. (organicchemistry, 1971) and his law degree (J.D., cum laude, 1981) from the University of Wisconsin - Madison. From 1972-1978 he worked for Miles Laboratories in new drug research. Warren was an associate attorney at Kenyon & Kenyon from 1981-1984, when he joined Merchant & Gould in Minneapolis. He founded their chemical practice group and became a partner in 1989. Warren also co-founded the Biotechnology Committee of the Minnesota Intellectual Property Law Association. 

He has published and spoken widely on legal topics, and was the 1993-1995 chair of the Chemical Practice Committee of the American Intellectual Property Law Association. He is currently the American Bar Associate representative to the Patent Office's Biotechnology Customer Partnership.

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