Firm Profile

Chernoff Vilhauer LLP
111 Southwest Columbia Street, Suite 725
Portland, OR 97201
United States
(503) 227.5631

Firm Details

Since its founding in 1970, Chernoff, Vilhauer, McClung & Stenzel, LLP has practiced all phases of intellectual property law and litigation relating to patents, trademarks, copyrights, trade secrets, licensing, computer technology, franchising, unfair competition, trade dress and false advertising. The firm's partners average 25 years experience and over 20 years longevity with the firm, and all of the firm's attorneys have technical degrees in physical or biological sciences. Specialized expertise is available in the biological, chemical, mechanical, electrical, electronic and computer fields. The firm has an active litigation practice, representing its clients effectively in federal court trials of the highest complexity with respect to the enforcement and defense of patent, trademark, unfair competition and false advertising claims.


Donald Haslett
Managing Partner

About Our Clients

Allerderm Laboratories, Inc.; Bend Research, Inc.; Brooklyn Hardware;  Cascade Corp., Inc.; Chinook Asia; Cyber Acoustics, LLC; The Greenbrier Cos.; Gunderson, LLC; Iseli Nursery; Kool Pak, LLC;  Leatherman Tool Group, Inc.; Leupold and Stevens; Longview Fibre Co.; Magno-Humphries Laboratories, Inc.; Microsound Systems, Inc.; NF Formulas, Inc.; Neil Kelly Co., Inc.; Nike, Inc.; Nutrition Now, Inc.; O'Loughlin Trade Shows; Planar Systems, Inc.; Pfizer, Inc.; Random Lengths Publications, Inc.; Relcom, Inc.; Richards Homewares; SAE, Inc.; Sartorius A.G.; Sam Medical Products; Sharp Laboratories of America, Inc.; Soloflex, Inc.; Stash Tea Company; Taylor Corporation; Tidland Corp.; Universal Enterprises, Inc.; Videx, Inc.; ViewPlus Technologies, Inc.;  White's Electronics, Inc.; World Class Technology


Tonia L. Closson
Business Admin

Firm Practice Areas

  • Copyright Law
  • Litigation - Intellectual Property
  • Litigation - Patent
  • Patent Law
  • Trademark Law

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