Patents by Inventor John F. Tyson

John F. Tyson 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).

  • Base for telephone set
    Patent number: D252876
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: September 11, 1979
    Assignee: Northern Telecom Limited
    Inventors: Clifford D. Read, Robert E. Hillmer, John F. Tyson
  • Base for telephone set
    Patent number: D253345
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: November 6, 1979
    Assignee: Northern Telecom Limited
    Inventors: Clifford D. Read, Robert E. Hillmer, John F. Tyson
  • Housing for telephone set
    Patent number: D253703
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: December 18, 1979
    Assignee: Northern Telecom Limited
    Inventors: Robert E. Hillmer, Donald T. Chadwick, John F. Tyson
  • Telephone base
    Patent number: D255680
    Type: Grant
    Filed: May 12, 1978
    Date of Patent: July 1, 1980
    Assignee: Northern Telecom Limited
    Inventors: Clifford D. Read, John F. Tyson
  • Telephone handset
    Patent number: D255681
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: July 1, 1980
    Assignee: Northern Telecom Limited
    Inventors: Clifford D. Read, John F. Tyson
  • Telephone set
    Patent number: D259042
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: April 28, 1981
    Assignee: Northern Telecom Limited
    Inventors: Clifford D. Read, John F. Tyson