“When you hire an Ater Wynne attorney, you get somebody who is a LEADER in their field. They’re going to be CREATIVE in finding you solutions and focused on value for the client.”

– Todd Mitchell, Managing Partner

Daniel P. Larsen


Dan Larsen is a partner in the Intellectual Property and Litigation Groups of Ater Wynne.  Dan joined Ater Wynne in 1996.  Prior to that, after graduating from law school cum laude, he served as law clerk to the Honorable Robert E. Jones of the United States District Court for the District of Oregon.  While Dan’s practice focuses on resolving and litigating business disputes, he also advises businesses in many substantive areas to develop creative, cost-effective solutions to achieve business goals.  Dan’s clients consult him to manage risk while balancing business interests and economic realities.  He tailors solutions that are feasible and practical.  Dan mainly guides businesses through disputes and litigation concerning commercial relationships and transactions, centered on contractual obligations, duties of directors and officers, intellectual property rights comprising trade secrets, trademarks, and copyrights, shareholder rights, business torts, and commercial insurance coverage.  Dan advises and litigates in both state and federal courts in Oregon, Washington, and California.

Following the national banking crisis, Dan has also been a lead investigator on multiple failed banks involving multi-million dollar losses with respect to evaluating potential responsibility of former directors and officers, and other professionals.

Dan was listed in Oregon Super Lawyers in 2006 and 2011 through 2017.  He has also been selected by his peers for inclusion in the Best Lawyers in America in the field of Labor and Employment litigation.

Dan is a proud father, as well as an avid windsurfer, downhill and cross-country skier, and tennis player.  His more sedentary activities include scuba diving and road bicycling.

Professional Experience

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  • Northwestern School of Law of Lewis and Clark College,  J.D., cum laude, 1994
  • University of Wisconsin-Madison, B.S., 1990

Admitted to Practice

  • Oregon
  • U.S. District Court, District of Oregon
  • Washington
  • U.S. District Court, Western District of Washington

Professional Activities

  • Lexwork International, Board Member
  • Lexwork International, Past Chair
  • Classroom Law Project, a non-profit organization, Board Member
  • Owen M. Panner American Inns of Court, Barrister
  • Oregon Sate Bar, Litigation Section, Member
  • Oregon State Bar, New Lawyers Division, Executive Committee Past Member
  • Oregon State Bar, Intellectual Property Section, Executive Committee Past Member
  • Oregon Association of Defense Counsel, Member
  • Oregon Association of Defense Counsel, Commercial Practice Group, Past Chair
  • Multnomah Bar Association, Member
  • American Bar Association, Member

Representative Matters

  • Efran v. All In Enterprises, et al., in consumer class action suit regarding alleged false advertising concerning pesticide, successfully obtained dismissal of claims against investor and pesticide marketer
  • Physician v. Physician Medical Group, after arbitration on claim of alleged disability discrimination, obtained award in favor of Medical Group dismissing all claims.  Later prevailed at trial on Physician’s Petition to Vacate the arbitral award, and obtained final judgment against Physician
  •  The Baseball Club of Tacoma, LLC v. SDL Baseball Partners, LLC, et al., in suit regarding alleged misrepresentations in sale of minor league baseball team for $20 million, following successful appeal to the Washington Court of Appeals, case resolved to satisfaction of clients   
  • A. Proctor Group Ltd. v. VaproShield, LLC, in a suit to enforce an exclusive distribution relationship, defeated motions for summary judgment and bifurcation to position case for successful resolution
  • Boyd Coffee Company v. Technivorm, B.V.
    Technivorm, B.V. v. Boyd Coffee Company, in suits commenced in different jurisdictions concerning the enforcement of a distribution agreement, succeeded in transferring foreign case and compelling litigation to proceed in client’s home forum
  • Edsal Manufacturing Company, Inc. v. Vault Brand, Inc., defeated claims of trademark infringement and vindicated client’s use of mark
  • UBS Financial Services v. Lawrence, et al., in suit for misappropriation of trade secrets and breach of employment agreements, obtained injunctive relief against former employees of financial services company
  • Collins v. Nelson, et al., in suit for alleged elder abuse and negligence against commercial real estate brokers, successfully obtained dismissal of complaint and first amended complaint, and then resolved to satisfaction of client
  • In re Cowlitz Bank, on behalf of the Federal Depository Insurance Corporation, investigated claims against directors and officers of failed Bank for their negligence, gross negligence and breach of fiduciary duty
  • In re United Western Bank, on behalf of the Federal Depository Insurance Corporation, investigated claims against directors and officers of failed Bank for their negligence, gross negligence and breach of fiduciary duty, and later filed suit on behalf of FDIC-Receiver for more than $30 million in damages
  • In re Silver Falls Bank, on behalf of the Federal Depository Insurance Corporation, investigated claims against directors and officers of failed Bank for their negligence, gross negligence and breach of fiduciary duty, and negotiated settlement of $1.3 million to the FDIC
  • Truong v. La Cie, Limited, defended manufacturer of computer hard drives in class action lawsuit and, after filing motion for summary judgment to dispose of all claims, achieved favorable resolution
  • Morris Ventures v. Full Market Value, Inc., et al., sued current and former officers and directors for securities fraud and, after completion of discovery and pending motions for summary judgment, obtained settlement of entire amount of investment lost in failed venture
  • SkylarkCo., LTD v. Enway, Inc., successfully placed company in receivership to preserve assets and prevent mismanagement
  • Large Manufacturing Company v. Former Employee and Creditor Company, achieved multi-million dollar settlement of federal copyright infringement and trade secret case for large manufacturing company after proving that former employee and a competitor took our client’s software, used it on over 100 projects, and destroyed evidence
  • Convasys Corporation v. Karen Fast, after discovery, mediated resolution to recover for client favorable settlement of substantial sums for shares of stock owed under stock option agreement
  • Douglas Berry and Dustin Milberg v. WebTrends, Inc., succeeded in compelling fraud claims totaling $8 million into arbitration and reaching final resolution on behalf of company
  • Skyward Construction v. Rogers Construction, et al., won award for compensatory and punitive damages for fraud
  • Brooks v. Pilip, won arbitration award for damages and attorney fees for conversion of client’s property
  • Whirlwind, Inc. v. West Oregon Wood Products, defended claim of breach of contract and won arbitration, as well as award of attorney fees
  • Venture Mechanics v. Apex Drive Laboratories, won summary judgment and final dismissal with prejudice of claims by investment agent who alleged partial ownership or equivalent damages of newly formed venture
  • Quantum Technology Partners II, L.P. v. Altman Browning and Company, et al., won final dismissal with prejudice of shareholder derivative action for alleged breaches of fiduciary duties by directors and officers

Representative Publications and/or Presentations

  • Demand in Shareholder Derivative Litigation, Oregon Association of Defense Counsel (Fall 2009) (co-author)
  • The Adequacy of Shareholder Representatives in Derivative Litigation, Oregon Association of Defense Counsel (2008) (co-author)
  • Attorney and Accountant Liability, American Bar Association, Litigation Section, Business Torts (Supp. 1997) (co-author)
  • Securities Arbitration, Oregon State Bar CLE chapter, Arbitration and Mediation (Supp. 2001) (co-author)
  • Information Technology - The New 800 LB Gorilla, Ater Wynne Employment Law Seminar (December 2013)
  • Computer Fraud and Abuse Act Update, Ater Wynne Employment Law Seminar (December 2012)