Marc R. Greenough

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 p...

Gregg Barton, a partner in the firm’s Business practice, has 25 years of experience focusing on state and local taxes principally in Washington (including Seattle, Bellevue and Tacoma matters), Oregon and Alaska. His experience includes advising clients with respect to gross receipt, sales and use, net income, ad valorem , real estate excise and public utility taxes, seeking private rulings, handling administrative appeals and litigating in state courts.

Linda Kelley Ebberson is one of Washington's preeminent divorce attorneys. An original member of Lasher Holzapfel Sperry & Ebberson, Linda is a skillful litigator with more than 30 years experience. Linda has a first-rate reputation with an outstanding track record in resolving disputes. Her Martindale-Hubbell rating has been the highest, AV preeminient, since 1997. She has been recognized by her peers as a "Super Lawyer" in Washington Law and Politics annually since 1999; as one of the T...

Ken Payson’s practice focuses on class action defense, other complex commercial litigation and appellate work, particularly with respect to claims under state and federal consumer protection laws. Ken represents clients from a variety of industries, including financial services, telecommunications, software, and digital media companies. He has obtained numerous orders dismissing putative class actions or denying class certification and has successfully defended them on appeal. He serves...

Casey Fitzpatrick, a member at COJK, has extensive experience with patents covering a variety of technologies. He focuses his practice on the preparation and prosecution of patent applications, inter partes review (IPR) proceedings, and patent infringement and invalidity analysis in the context of litigation and opinions of counsel. Casey’s technical expertise covers a wide range of computing technologies, including vehicle computer systems, mapping and navigation, messaging and communi...

George C. Rondeau, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law, Trade Secrets Law and Trademark Law. George C., who practices law in Seattle, Washington, has been recognized since 2007. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which George C. is held by other top lawyers in the same geographic and legal practice area.

Marc C. Levy is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property, Litigation - Patent and Trademark Law. Marc C., who practices law in Seattle, Washington, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marc C. is held by other top lawyers in the same geographic and legal practice area.

Kellie A. Tabor is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Kellie A., who practices law in Seattle, Washington, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kellie A. is held by other top lawyers in the same geographic and legal practice area.

Mike Hintze is a Member Partner at Hintze Law PLLC and a recognized leader in privacy and data protection law, policy, and strategy. He advises a wide range of companies, industry associations, and other organizations – from startups to largest global technology companies. With more than 25 years of experience in privacy and data protection, Mike emphasizes pragmatic and actionable advice that enables his clients to meet their objectives while complying with the law and managing risk. M...

Professional Experience Kameron Kirkevold’s practice focuses on complex guardianship, probate and trust matters arising under Washington State’s Trust and Estate Dispute Resolution Act (TEDRA). He joined Helsell Fetterman in 2010 after two years as an associate in his father’s firm of Kirkevold Law Offices, Inc., and has been a partner at the firm since 2016. Kameron works with professional fiduciaries, individuals, and families dealing with simple and complex matters arisin...