Patents by Inventor James P. Thomsen

James P. Thomsen 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).

  • Headphone construction
    Patent number: 4302635
    Abstract: A headphone includes a pair of ear cup assemblies attached to a headband. Each ear cup assembly includes a cushion, an earplate, a back plate and an acoustic transducer. These elements snap together and are held together by integral fasteners. Each ear cup assembly is attached to the headband by a ring-shaped yoke which is entrapped between the assembled back plate and ear plate. The result is a durable, lightweight structure which is easy to assemble on a mass production basis.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: November 24, 1981
    Assignee: Koss Corporation
    Inventors: Wayno A. Jacobsen, James P. Thomsen
  • Phonograph cartridge
    Patent number: D245022
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: July 12, 1977
    Assignee: Shure Brothers Incorporated
    Inventor: James P. Thomsen
  • Phonograph cartridge
    Patent number: D245433
    Type: Grant
    Filed: September 2, 1976
    Date of Patent: August 16, 1977
    Assignee: Shure Brothers Incorporated
    Inventors: James P. Thomsen, Ronald G. Theilmann
  • Phonograph stylus
    Patent number: D255898
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: July 15, 1980
    Assignee: Shure Brothers, Inc.
    Inventors: James P. Thomsen, Ronald G. Thielmann