John F Marsh

Member

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direct 614.229.3230
assistant 614.229.3271

Overview

As the Co-Chair of the Firm’s Business Litigation Practice Group, John’s commercial litigation practice concentrates on trade secrets and the enforcement of restrictive covenants throughout the United States. John has been consistently recognized by Best Lawyers of America for Intellectual Property Litigation, including Lawyer of the Year in Columbus in 2022 and 2024.

His expertise has been quoted in top publications including Bloomberg, The Wall Street Journal, Wired, and Law360. John is also Chair of the American Intellectual Property Law Association’s Trade Secret Law Committee and played an active role in supporting the Defend Trade Secrets Act, which The Wall Street Journal called the “most significant expansion” of federal IP law in 70 years.

Practice Areas

Credentials

Education

Vanderbilt Law School (J.D., 1989)
    Associate Editor, Vanderbilt Law Review
John Carroll University (B.A., 1986, cum laude)

Bar Admissions

Ohio (1995)
New York (1990)
United States Court of Appeals for the Sixth Circuit (2004)
United States District Court for the Southern District of Ohio (1996)
United States District Court for the Northern District of Ohio (2003)
United States District Court for the Eastern District of New York (1990)
United States District Court for the Southern District of New York (1990)
United States District Court for the Eastern District of Michigan (2014)

Professional Highlights

As the Co-Chair of the Firm’s Business Litigation Practice Group, John’s commercial litigation practice concentrates on trade secrets and the enforcement of restrictive covenants throughout the United States. John has been consistently recognized by Best Lawyers of America for Intellectual Property Litigation, including Lawyer of the Year in Columbus in 2022 and 2024.

His expertise has been quoted in top publications including Bloomberg, The Wall Street Journal, Wired, and Law360. John is also Chair of the American Intellectual Property Law Association’s Trade Secret Law Committee and played an active role in supporting the Defend Trade Secrets Act, which The Wall Street Journal called the “most significant expansion” of federal IP law in 70 years.

Practice Areas

Education

Vanderbilt Law School (J.D., 1989)
    Associate Editor, Vanderbilt Law Review
John Carroll University (B.A., 1986, cum laude)

Bar Admissions

Ohio (1995)
New York (1990)
United States Court of Appeals for the Sixth Circuit (2004)
United States District Court for the Southern District of Ohio (1996)
United States District Court for the Northern District of Ohio (2003)
United States District Court for the Eastern District of New York (1990)
United States District Court for the Southern District of New York (1990)
United States District Court for the Eastern District of Michigan (2014)

Anatomy of a Phyrric Victory: Did Defendant Goodyear Tire and Plaintiff CODA Development Both Lose a $65 Million Trade Secrets Case?

Last week, a jury hit Goodyear Tire & Rubber with a $65 million verdict in a trade secrets case in Akron presided over by U.S. District Court for the Northern District of Ohio Judge Sara Lioi. On its face, one... Read More

3 Ways to Avoid Litigation When Hiring an Employee from a Competitor

When hiring an employee from a competitor, the last thing a company wants is to be embroiled in litigation accusing it of hiring the employee to steal that competitor's customers or trade secrets. As a result, the process of "on-boarding"... Read More

John Marsh Addresses Avoiding Costly Litigation in Latest Blog Post:

Another Idea for Improving the Defend Trade Secrets Act: Providing an "Off Ramp" to the Plaintiff Who Wants to Avoid a Costly Litigation In a post last year, I proposed a solution for a recurring problem in trade secret litigation–namely,... Read More

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