Shareholder
Attorney Assistant
Nonie Barrigar
nbarrigar@wnlaw.com
(801) 533-9800
Experience
Joined Workman Nydegger in 2009
Paralegal
David P. Johnson is an intellectual property litigator who represents clients in patent, trademark, trade secret, copyright, and unfair-competition disputes. He helps brand owners, patent holders, and e-commerce businesses enforce valuable rights, defend against infringement claims, and resolve business-critical IP disputes efficiently.
His litigation practice includes federal-court actions and proceedings before the Trademark Trial and Appeal Board and Patent Trial and Appeal Board. He has represented clients in trademark oppositions, cancellation matters, patent infringement disputes, trade secret and unfair-competition litigation, and marketplace enforcement matters. He has significant experience with Amazon Patent Evaluation Express (APEX) proceedings and understands the interplay of APEX proceedings with parallel district court litigation. He also regularly serves as local counsel, helping national trial teams navigate Utah practice, procedure, and case strategy.
Dave has substantial experience with emergency-relief proceedings, representing both plaintiffs and defendants. His appellate experience includes winning a reversal in an administrative-procedure dispute and in a TTAB appeal for a major e-commerce brand.
Dave advises clients on the full lifecycle of their trademark portfolios, both domestically and abroad. He has managed hundreds of trademark applications and counsels on clearance, registration, portfolio development, licensing, enforcement, and IP due diligence. His work includes assessing IP issues in connection with new product lines, acquisitions, divestitures, and technology-transfer arrangements.
Dave also advises clients on data protection issues in connection with various laws. He helps clients assess legal obligations and risks, including presenting company-wide trainings, drafting and reviewing privacy and retention policies, and mitigating risks associated with cross-border data transfers.
As a registered patent attorney, Dave brings patent-prosecution experience and an engineering background to complex IP disputes and business counseling. He is regularly recognized in publications such as Chambers USA, The Best Lawyers in America, the WTR 1000, and Mountain States Super Lawyers.
Dave is also an adjunct professor at the University of Utah S.J. Quinney College of Law and has directed the local IP Moot Court competition between the University of Utah and Brigham Young University for more than a decade.
Services & Technologies
Services
- Copyright
- E-Commerce
- International IP
- IP Counseling
- Licensing and Transactional Work
- Litigation
- Patents
- Post-Grant Patent Proceedings
- Trade Secrets
- Trademarks
Technologies
Experience
Defeated motion for preliminary injunction and temporary restraining order filed against patent holder, 2024
Represented patent holder in successful Amazon Patent Evaluation Express (APEX) proceedings, 2024
Represented major medical device company in trademark opposition proceeding. Favorable settlement, 2023
Represented major ecommerce brand in TTAB appeal. Won reversal, 2023
Represented major ecommerce brand in trademark opposition proceeding. Favorable settlement, 2022
Represented large restaurant chain in trademark opposition proceeding. Secured dismissal of third party’s application with prejudice, 2021
Represented client in district court litigation and appeal regarding state administrative procedure act. Won reversal on appeal, 2016
Secured temporary restraining order and preliminary injunction in patent case. Favorable settlement, 2016
Defended furniture company in multi-patent, multi-defendant patent infringement litigation involving kit claims in a utility patent. Successfully negotiated a favorable settlement, 2013
Represented plaintiff in unfair competition, trade secret misappropriation, and breach of contract matters regarding a former employee and business purchaser. Successfully negotiated settlement after a year of hard fought litigation, thereby saving the client huge amounts of attorneys’ fees and costs and the risk associated with trial, 2013
Represented applicant in trademark opposition proceedings against a large, nationwide representative organization for physicians in the United States. Opposer ultimately withdrew the oppositions, 2013
Education & Admissions
Education
J.D., S.J. Quinney College of Law, University of Utah, 2010
B.S., Civil and Environmental Engineering, University of Utah, 2007
Admissions
U.S. Circuit Court of Appeals, Ninth Circuit
Utah Supreme Court
Salt Lake County Bar
Nevada Supreme Court
Registered Patent Attorney, U.S. Patent and Trademark Office
Various federal district courts
Recognitions
2019 – Present, Board of Directors, Workman Nydegger
2018 – 2024, 2026 – Present, The Best Lawyers in America©
2025, Chamber and Partners USA
2019 – 2025, Chair of Recruiting Committee, Workman Nydegger
2024 – 2025, WTR 1000, World Trademark Review
2022 – 2025, Mountain States, Super Lawyers
2019 – 2020, Rising Star, Super Lawyers
2015, “Utah Legal Elite,” Utah Business Magazine
Memberships & Activities
David K. Winder IP Inn of Court
2022 – 2023, Geographical Indications Committee, INTA
2024 – present, Data Privacy Committee, INTA
Insights & Events
Workman Nydegger is pleased to announce that eight of its attorneys have been recognized in the 2026 edition of the Mountain States Super Lawyers list. The Workman Nydegger attorneys included in the Mountain States Super… read more
Workman Nydegger is pleased to share that 20 of its attorneys have been recognized as leading legal professionals in Salt Lake City in the 2027 edition of The Best Lawyers in America®. Adrian J. Lee… read more
Workman Nydegger is honored to be recognized for Intellectual Property in the 2026 edition of Chambers USA, a prestigious legal guide showcasing the nation’s top law firms and attorneys. Chambers USA evaluates firms and individual… read more
The 2026 edition of the IAM Patent 1000 ranking has recognized Workman Nydegger as one of the leading patent law firms in the United States: Utah jurisdiction. The following attorneys were recognized for their outstanding contributions: In… read more
Attorneys Justin Cassell, David Dellenbach, Sterling Fillmore, David Johnson, and Matthew Todd will be attending the 2026 Annual International Trademark Association [INTA] meeting in London, England. If you’re attending the annual meeting or would like… read more
Workman Nydegger attorneys David Johnson and Timothy Nichols will be attending the 2026 Prosper Show in Las Vegas, taking place on March 10-12, 2026. The Prosper Show is where established marketplace sellers (Amazon, Walmart, and beyond)… read more
Workman Nydegger is pleased to announce its recognition in the WTR 1000 2026: The World’s Leading Trademark Professionals, along with attorneys David Johnson, Matthew Barlow, and Michael Frodsham in the United States, Utah jurisdiction. The WTR… read more
Workman Nydegger is pleased to announce that thirteen of its attorneys have been recognized in the 2025 edition of the Mountain States Super Lawyers list. The Workman Nydegger attorneys included in the Mountain States Super… read more
SALT LAKE CITY – August 21, 2025 – Workman Nydegger is thrilled to announce that 20 of its attorneys were named among the top legal professionals in Salt Lake City in the 2026 edition of… read more
Workman Nydegger is honored to be recognized for Intellectual Property in the 2025 edition of Chambers USA, a prestigious legal guide showcasing the nation’s top law firms and attorneys. Chambers USA evaluates firms and individual… read more
Workman Nydegger is proud to announce that attorneys Brian Platt, David Johnson, and Timothy Nichols will be attending the 2025 Prosper Show in Las Vegas, taking place on March 25-27, 2025. The Prosper Show is… read more
Workman Nydegger is pleased to announce its recognition in the WTR 1000 2025: The World’s Leading Trademark Professionals, along with attorney David P. Johnson in the United States, Utah jurisdiction. The WTR 1000 is a unique guide… read more