Atty. John D. Denkenberger
John Denkenberger is the managing member of COJK, a member of the firm's executive committee, and chair of the litigation practice group. John has successfully litigated patent, trademark, trade secret, and unfair business competition issues in federal and state courts.
Profile Summary
About John D. Denkenberger at a glance
John D. Denkenberger is a ip attorney based in Seattle, Washington, practicing at Christensen O'Connor Johnson Kindness PLLC. Admitted to practice in Washington, Washington State Bar. Educated at Seattle University (J.D., 1995) and State University of New York at Buffalo (B.S., 1986). Recognitions include Best Lawyers in America — Litigation - Intellectual Property (2026), Best Lawyers in America — Patent Law (2026), and Best Lawyers in America — Additional Areas of Practice: (2026). Serands clients in Seattle, WA and the surrounding metropolitan area.
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About
- John Denkenberger is the managing member of COJK, a member of the firm's executive committee, and chair of the litigation practice group
- John has successfully litigated patent, trademark, trade secret, and unfair business competition issues in federal and state courts
- He has also successfully litigated AIA post-grant challenges, including inter partes review, before the Patent Trial and Appeal Board
- In addition to his litigation practice, John also advises clients on foreign and domestic patent and trademark procurement, technology licensing, and litigation strategies in a variety of technology areas, including mechanical, electromechanical, acoustics, and software
- Prior to becoming an attorney, John worked for 10 years as a research and design engineer in the aerospace and aircraft industry
- Since its inception in 2013, John has been named to Intellectual Asset Management's Patent 1000 — The World's Leading Patent Professionals
- He is ranked in Chambers USA for intellectual property law
- is recognized in Managing Intellectual Property magazine’s IP Stars for his work in patent law
- is included in the list of The Best Lawyers in America
- and has been named a Washington Super Lawyer
Practice Areas Explained
John D. Denkenberger's Areas of Practice
Each practice area below reflects the types of cases John D. Denkenberger handles, with a brief overview of what that area of law covers.
IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.
John D. Denkenberger is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Washington →
Jurisdictional Context
Why local counsel matters in Washington
Practicing law in Washington. Legal matters in Washington are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Seattle are typically filed in the local municipal court or the appropriate Washington state district court, depending on subject matter and amount in controversy. An attorney licensed in Washington brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Washington courts without local counsel or pro hac vice admission.
Looking for additional Washington attorneys? Browse all attorneys in Seattle or all attorneys in Washington.
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