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Experienced in all aspects of intellectual

property acquisition, preservation, enforcement, and


WILLIAM P. OBERHARDT is a Chicago attorney with over 30
years of litigation experience in the state and federal courts in
Illinois and throughout the country. Mr. Oberhardt practices in the
area of intellectual property law, with a particular focus on patents
and trademarks.

The firm handles legal matters in the following practice areas: 

  • Intellectual Property
  • Patents
  • Trademarks
  • Trade Secrets
  • Unfair Competition
  • Litigation
  • Appeals
  • Licensing
  • Technology Transfer
  • Opinions and Counseling

Mr. Oberhardt is experienced in all aspects of intellectual property litigation, from pre-suit investigations and opinions through discovery, trial, and appeal. He is versed in a wide variety of technologies, including aerospace and aeronautical components, printing press systems, power tools, pharmaceuticals, medical equipment, biotech applications, hydraulic and pneumatic components, plastics, catalysts, radar equipment, electronic systems, computer control systems, computer software, sporting goods, toys, retail anti-theft and storage systems, automotive components, internet retail services, and snack food manufacturing. Mr. Oberhardt represents companies that range in size from the largest multinational companies to individual entrepreneurs.

Mr. Oberhardt’s practice includes counseling clients on the cost-effective acquisition, preservation, enforcement, and licensing of intellectual property rights. He has extensive experience in patent and trademark prosecution. Mr. Oberhardt has performed substantial opinion work concerning the infringement, validity, and enforceability of patents and trademarks. He has developed industry-wide licensing programs using litigation and non-litigation strategies.