Dr. Kenneth H. Sonnenfeld
Ballard Spahr
1675 Broadway, 19th Floor
New York, NY 10019-5820
United States

Dr. Sonnenfeld is a patent attorney with over 30 years of experience as intellectual property counsel to biotechnology and pharmaceutical industry clients ranging from domestic startups to multinational corporations and research institutions.
Dr. Sonnenfeld uses his technical background in pharmacology to advise on the complex technical issues that arise in biotech and pharmaceutical patent and trade secret matters. Dr. Sonnenfeld counsels clients on a range of inter-party issues, including due diligence, litigation, foreign oppositions, and licensing. He supervises complex, strategic patent prosecution before the U.S. Patent and Trademark Office and oversees foreign prosecution. Dr. Sonnenfeld has provided counsel on diligence matters aggregating in value to several billion dollars.