Patents by Inventor David G. Turnbull

David G. Turnbull 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).

  • Call management system case assembly
    Patent number: D413894
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: September 14, 1999
    Assignee: Matthews Communications Management, Inc.
    Inventors: Gordon H. Matthews, Byrne O. Benfield, Larry A. Stell, David G. Turnbull
  • Telephone control module case assembly
    Patent number: D414188
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: September 21, 1999
    Assignee: Matthews Communications Management, Inc.
    Inventors: Gordon H. Matthews, Byrne O. Benfield, Larry A. Stell, David G. Turnbull