Eric Sosenko is an intellectual property attorney with more than 25 years of experience focusing his practice on patent and trademark procurement, product and mark clearance, and related transactions. He has a vast understanding of U.S. and foreign patent and trademark law, including extensive experience in international protection under multinational treaties.

  • Represents large domestic and foreign companies, as well as local start-ups and second-stage companies in a wide variety of technical fields, including mechanical, electromechanical, medical, and material arts
  • Counsels clients on the strategic implementation and management of domestic and international intellectual property portfolios
  • Drafts and prosecutes patents in a variety of technical areas, including automotive technology; compressors, evaporators, and related systems; manufacturing, molding, and packaging machinery; consumer products; sporting goods; plastic containers; medical devices; glazing technology processes; plasma coating; injection molding (plastics and semi-solid metals) and blow molding; and fluid handling
  • Renders freedom-to-operate, noninfringement, and validity opinions of varying analytical depth and complexity
  • Prepares guidance and risk assessment in connection with design around strategies to avoid infringement
  • Counsels clients on trademark selection and branding for new products and services



Representative Matters

  • Defended Shanghai Xing Te Hao in suit for infringement of plaintiff's hand tool patent; Black & Decker Inc., et al. v Shanghai Xing Te Hao Industrial Co. Ltd., et al., Case No. 02 C 4615 (N.D. Ill.)
  • Settled action against Sidel for infringement of patent on logic-controlled plastic molding machine; Milacron Inc. v. Sidel S.A., et al., Civil Action No. 01-71888 (E.D. Mich.)
  • Defended Uniloy Milacron in suit for infringement of plaintiff's patent for blow molding machine equipment; Sidel v. Uniloy Milacron Inc., et al., 61 USPQ2d 1480 (N.D. Ga., 2001)
  • Settled action against Asian Metals for infringement of patent on particulate feedstock for semi-solid metal injection molding; Thixomat Incorporated v. Asian Metals and Alloys Corp., Civil Action: 01C 0486 C (W.D. Wisc.)

Prior Experience

  • Brinks Gilson & Lione, Shareholder, 2005-2015; Counsel, 2001-2004
  • Harness, Dickey and Pierce, Principal, 1996-2001; Associate, 1989-1996




Court Admissions



  • The Best Lawyers in America, 2010-2023
    • Recognized in practice areas of:
      • Litigation - Intellectual Property
      • Patent Law
      • Trademark Law 
    • Ann Arbor Litigation - Intellectual Property "Lawyer of the Year," 2019
    • Ann Arbor Patent Law "Lawyer of the Year," 2015, 2017, 2021 and 2023
  • Leading Lawyers Magazine Michigan, 2017
    • Recognized in practice areas of:
      • Copyright & Trademark Law
      • Intellectual Property Law
      • International Business & Trade Law
      • Patent Law
  • DBusiness, Top Lawyers, 2014, 2015, and 2017
  • Managing Intellectual Property IP STARS, 2013-2021
    • Recognized as a Patent Star and Trademark Star, 2021, 2022
  • Michigan Super Lawyers, 2006-2011

Professional & Community Involvement

  • American Intellectual Property Law Association
    • Patent Law Committee
    • Patent Cooperation Treaty Issues Committee
  • Michigan Intellectual Property Law Association
  • State Bar of Michigan
    • Intellectual Property Law Section, Secretary/Treasurer
    • Arts, Communications, Entertainment & Sports Section
  • Washtenaw County Bar Association
    • Intellectual Property Law Section
      • Co-chairperson 1995-1996 and 2000-2001
  • Odyssey of the Mind
    • Coach, 2001-2005
  • Fairland Subdivision Association
    • Treasurer, 2013-2015
  • Cub Scouts of America
    • Cub Master, 2010-2011
    • Den Leader, 2007-2011
  • Ann Arbor Chamber of Commerce
    • Morning Edition Planning Committee, 2005-2007
      • Program Chair, 2007
  • Leadership Ann Arbor, 2004-2005

News & Insights


  • Eric J. Sosenko’s move to Honigman is mentioned in the National Law Journal article “Laterals”
    Media |
  • Eric J. Sosenko’s move to Honigman is featured in the American Lawyer article “Half-Dozen K&L Gates Partners Decamp, Plus More Lateral Moves”
    Media |

Seminars & Events

  • Growing Together: Lawyers, Accountants, and Entrepreneurs Sound Off
    Event | Detroit, MI | | | Co-presenter
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