About Us At the Law Offices of Bruce J. Chasan, LLC in Philadelphia, PA, we have over 35 years of experience practicing in litigated complex civil matters for the Federal Government and Fortune 500 corporations, including pharmaceutical patent infringement (ANDA) cases. We offer lead trial and appellate counsel in a wide range of business and commercial disputes, including intellectual property law, arbitration, defamation, mediation, product liability, right of publicity, and personal injury cases.