Donald B. Haslett
Of Counsel

Don Haslett joined Chernoff Vilhauer in September of 1977 and has been a partner in the firm since January of 1984.  He is member of the Oregon State Bar and is admitted to practice before the United States Patent and Trademark Office, the United States District Court for the District of Oregon, and the Federal Courts of Appeals for the Ninth Circuit and the Federal Circuit. 

Don has been listed in "The Best Lawyers in America" Since 2012 in Copyright Law and Intellectual Property Litigation areas. 


His practice emphasizes patent and trademark applications and licensing.

Before attending the Cornell Law School and beginning his career as a patent lawyer, Don served for eight years as an officer in the Surface Warfare branch of the United States Navy, including experience in navagation, gunnery, and sonar, and two years as Commanding Officer of U.S.S. Esteem, an ocean-going minesweeper.  

Don has been involved in a wide variety of intellectual property matters, including patentability searches, preparation and prosecution of United States and foreign utility patent and design patent applications, negotiating and advising clients regarding technology transfer and licensing agreements, counseling clients and providing opinions regarding patentability, patent validity, and patent infringement, counseling clients regarding choices of trademarks and service marks and obtaining registrations of such marks, and litigation.

His intellectual property transactional experience includes:

  •  Industrial technology transfer and licensing transactions


  • Negotiating license agreements relating to patents, trademarks, and copyrights


His U.S. and foreign patent preparation and prosecution experience includes:

  • Railroad freight car construction


  • Magnetic reed switch technology


  • Emergency medical care devices


  • Devices for use in orthopedic surgery


  • Implantable devices for use in neurosurgery


  • Folding knives and multipurpose hand tools


  • Windshield wiper drive mechanisms


  • Firearms operating mechanisms and safety devices


Donald B. Haslett
(503) 227-5631 (Phone)
(503) 228-4373 (Fax)



U.S Naval Academy, B.S.

Cornell Law School, J.D.


Bar Admissions


U.S. Patent and Trademark Office

U.S. Court of Appeals, Ninth Circuit,

U.S. Court of Appeals, Federal Circuit

U.S. District Court for the District of Oregon

Trade Organizations

American Intellectual Property Law Association

American Bar Association

Oregon Patent Law Association

(President, 1983-1984)

Pacific Northwest Defense Coalition

Federal Bar Association, Oregon Chapter

Oregon State Bar

Intellectual Property Law and Computer and Internet Law section

Multnomah Bar Association




In his spare time Don enjoys music, travel, fly fishing, and cycling. 


Don retired from the U.S. Naval Reserve as a Captain in 1994.


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