William C Spence - SpencePC

Partner - SpencePC

William C Spence is a trial lawyer and founding partner of SpencePC, an IP and complex litigation boutique in Chicago. The firm assists both individual and business clients to obtain their best possible outcome in contentious legal matters. Mr Spence’s extensive experience includes litigation, arbitration and mediation involving a wide range of IP and complex commercial disputes.

More specifically, Mr Spence serves clients by providing advocacy and advice in the areas of patent infringement, trade secret misappropriation, unfair competition (including conspiracy, tortious interference, and related antitrust claims), breach of contract, post-grant patent proceedings (eg, inter partes reviews), trademark infringement, copyright infringement and other commercial disputes. He has litigated claims in both state and federal courts throughout the United States. Additionally, he has extensive experience with patent monetisation strategies and management of complex, international patent infringement litigation involving multiple parties and jurisdictions, including Asia.

Mr Spence is a registered patent attorney and published author and frequent speaker on patent monetisation and other IP issues. He maintains an AV Preeminent rating from Martindale-Hubbell, the highest possible rating for an attorney for both ethical standards and legal ability, and he has been repeatedly recognised in editions of the Legal 500 United States for trade secrets. During his career he has also been repeatedly recognised as a ‘super lawyer’ in the area of intellectual property.

Mr Spence is a graduate of the University of Notre Dame, where he obtained a BS in chemical engineering and in biophysics (physics in medicine). He is also a graduate of the University of Houston Law Centre. Before forming SpencePC, he spent 12 years practising law with Kirkland & Ellis LLP in Chicago and Tokyo.

Professional associations

  • ABA
  • FCBA
  • LES
  • The Richard Linn American Inn of Court


  • Brokering
  • Defensive patent aggregation
  • Legal
  • Licensing

Firm details


405 North Wabash
Suite P2E
Chicago IL 60611
United States

Contact details

E: william.spence@spencepc.com
T: +1 312 404 8882
F: +1 312 635 2299
: @wcspence
W: www.spencepc.com


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Issue 88