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John R. Riddell

620 Freedom Business Center
Suite 300
King of Prussia, PA 19406
(610) 354-8489
(610) 354-8299 - Fax

John R. Riddell completed his undergraduate education at the University of Pennsylvania in 1981. Following graduation, Mr. Riddell attended Villanova Law School, receiving his juris doctor in 1984.

Following graduation, Mr. Riddell immediately began his legal career and developed an extensive defense litigation practice in the Philadelphia area before coming to Marshall Dennehey Warner Coleman & Goggin in early 1990.

During his years with the firm, Mr. Riddell has defended clients in professional malpractice, premises liability, products liability, and motor vehicle liability matters. He was elected shareholder in 1993. Mr. Riddell is admitted in Pennsylvania and New Jersey as well as the Eastern District of Pennsylvania. 

Classes/Seminars Taught

  • CLE Down the Shore, Pennsylvania Bar Institute, August 2010

Published Works

  • "The Rescue Doctrine Meets Superseding Cause," Defense Digest, Vol. 18, No. 4, December 2012
  • “The PIGA Setoff Statute Revisited,” Defense Digest, Vol. 6, No. 6, December 2000

  • "PIGA Sett-Off Statute Interpreted," Defense Digest, Vol. 6, No. 1, February 2000 

  • "Is 'Double-Dipping' Still Permitted Under The Income Loss Provisions Of The MVFRL?," Defense Digest, April 1996 


  • Villanova University School of Law, Villanova, PA (J.D., 1984)

  • University of Pennsylvania, Philadelphia, PA (B.A., 1981)

Defense Digest Article December 1, 2012
  Key Points: The rescue doctrine will not make an original tortfeasor liable for injuries attributable to a superseding cause. The viability of the rescue doctrine must be determined on a..., Defense Digest, Vol. 18, No. 4, December 2012


  • Villanova University School of Law (J.D., 1984)
  • University of Pennsylvania (B.A., 1981)

Bar Admissions

  • New Jersey, 1984
  • Pennsylvania, 1984

Associations & Memberships

  • Delaware County Bar Association Member
  • Pennsylvania Bar Association Member

Honors & Awards

Year Joined Organization: 1990

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