WHDA is a full service intellectual property law firm. Our patent lawyers have strong technical backgrounds in the mechanical ... , electrical, electronic, optical, chemical, pharmaceutical, metallurgical, and biotechnical arts. We litigate in the District Courts and the ITC. We also handle interferences, reexaminations, licensing, counseling, patentability, validity and infringement opinions, patent preparation and prosecution. WHDA is one of the top 25 patent firms in the United States, according to Intellectual Property Today's 2011 report. read more