John Peter Mason

John Peter Mason: Attorney with Clapper, Patti, Schweizer & Mason AV stamp icon


John Mason has a computer-like mind for identifying the names of the manufacturers, suppliers and installers of asbestos-containing products present at our clients’ multitude of jobsites located throughout the country, including shipyards, onboard ships, military bases, refineries, schools, hospitals, government buildings and other commercial and industrial sites.

Mr. Mason heads the firm’s investigative department and has had keen success identifying and locating the companies responsible for causing our clients’ asbestos-related diseases. Mr. Mason is recognized by asbestos attorneys across the country as one of the foremost experts in “product identification,” that is, the gathering of evidence to prove which companies’ products were used where our clients worked and were exposed.

Mr. Mason’s work in this area has not just benefitted clients of Clapper, Patti, Schweizer & Mason, but asbestos victims generally. Mr. Mason has shared the evidence he has obtained showing where certain companies’ products were used and was instrumental in getting these previously unidentified locations added to a number of Bankruptcy Trust job site lists, thereby permitting workers at these locations to be appropriately compensated.

John P. Mason has devoted his career to representing plaintiffs who have been wrongfully injured, with extensive experience in helping those diagnosed with mesothelioma due to asbestos exposure. Mr. Mason is involved in all aspects of litigation, with specific expertise in developing vital witness and documentary evidence supporting victims' claims.

As one of the foremost experts in product identification, Mr. Mason heads the firm's investigative department and has had keen success identifying and locating the companies responsible for causing our clients' injuries. He has been awarded the highest rating from Martindale-Hubbell distinguishing him as a preeminent attorney with superior ethics and professional experience.

Mr. Mason has worked for the benefit of injured clients since his graduation from San Francisco Law School in 1997. Always available to speak to our clients and answer their questions, Mr. Mason regularly gives clients his cell phone number and invites them to call him any time.

Areas of Practice (79)

  • Personal Injury
  • Civil Litigation
  • Industrial Accidents
  • Aged and Aging
  • Mesothelioma
  • Admiralty and Maritime Law
  • Admiralty Law
  • Boat Manufacturing Liability
  • Cruise Ship Injuries
  • Diving and Offshore Injuries
  • Jones Act
  • International Maritime Law
  • Marine Law
  • Marine Liability
  • Maritime Accidents
  • Maritime Personal Injury
  • Maritime Products Liability
  • Seamens Claims
  • Complex and Multi-District Litigation
  • Construction Law
  • Defective Hip Implants
  • Defective Knee Replacements
  • Insurance
  • Labor and Employment
  • Litigation
  • Complex Litigation
  • Federal Civil Litigation
  • Federal Litigation
  • Trial Practice
  • U.S. Supreme Court Litigation
  • Lung Cancer
  • Medical Malpractice
  • Negligence
  • Occupational Safety and Health
  • Occupational Injuries
  • Accidents
  • Automobile Accidents and Injuries
  • Automobile Negligence
  • Bicycle Accidents
  • Boating Accidents
  • Bodily Injury
  • Brain Injury
  • Bus Accidents
  • Catastrophic Injury
  • Commercial Vehicle Liability
  • Cumulative Trauma
  • Electrical Injury
  • Head Injury
  • Motor Vehicle Accidents and Injuries
  • Motorcycle Accidents
  • Pedestrian Injuries
  • Personal Injury Appeals
  • Plaintiffs Personal Injury
  • Rental Vehicle Litigation
  • School Bus Accidents
  • Slip and Fall
  • Third Party Wrongful Death
  • Tourist Injuries
  • Traumatic Brain Injury
  • Whiplash
  • Wrongful Death
  • Products Liability
  • Seatbelt Injury
  • Torts
  • Civil Liability
  • Intentional Torts
  • Mass Torts
  • Tort Liability
  • Toxic Torts
  • Asbestos Litigation
  • Mold Litigation
  • Occupational Cancer
  • Occupational Disease
  • Pesticide Litigation
  • Radiation Injury
  • Silicosis Litigation
  • Toxic Exposure
  • Toxic Tort Class Actions
  • Workers Compensation

Education & Credentials

Contact Information:
415-332-4262  Phone
800-440-4262  Phone
415-331-5387  Fax
University Attended:
California State University at Hayward, B.S., 1992
Law School Attended:
San Francisco Law School, J.D., with honors, 1997
Year of First Admission:
1998, California
State Bar of California; Consumer Attorneys of California.
Birth Information:
Goleta, California, March 16, 1970
Hobbies & interests:
Mr. Mason and his family volunteer in the Margaret Todd Center program that provides yard work assistance for seniors and the disabled in Novato, California. Mr. Mason is also an avid gardener and participates in the Marin Open Garden Project.
Payment Information:
  • Free Initial Consultation

Peer Reviews

  • 5.0/5.0
  • High ethical standing icon
  • A Martindale-Hubbell Peer Rating reflects a combination of achieving a Very High General Ethical Standards rating and a Legal Ability numerical rating.

*Peer Reviews provided before April 15, 2008 are not displayed.

Novato, California

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