Patents by Inventor John L. Wilkinson

John L. Wilkinson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Portable adjustable back support
    Patent number: D294319
    Type: Grant
    Filed: June 11, 1985
    Date of Patent: February 23, 1988
    Assignee: Medesign Limited
    Inventors: John D. G. Troup, James I. Walkingshaw, Peter D. G. Dean, John L. Wilkinson
  • Audible alarm for security units
    Patent number: D366849
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: February 6, 1996
    Assignee: Signature Industries Ltd.
    Inventors: John L. Wilkinson, Terence K. A. Smith