Patents by Inventor Frank R. Keeler

Frank R. Keeler 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).

  • Control panel
    Patent number: D272433
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: January 31, 1984
    Assignee: American District Telegraph Company
    Inventors: Beth A. Trabucchi, Hugh D. Dyer, Frank R. Keeler
  • Control panel
    Patent number: D272434
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: January 31, 1984
    Assignee: American District Telegraph Company
    Inventors: H. Patrick Thornton, Hugh D. Dyer, Frank R. Keeler
  • Control panel
    Patent number: D272435
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: January 31, 1984
    Assignee: American District Telegraph Company
    Inventors: H. Patrick Thornton, Beth A. Trabucchi, Hugh D. Dyer, Frank R. Keeler
  • Control panel
    Patent number: D272436
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: January 31, 1984
    Assignee: American District Telegraph Company
    Inventors: Beth A. Trabucchi, Hugh D. Dyer, Frank R. Keeler
  • Control panel
    Patent number: D272530
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: February 7, 1984
    Assignee: American District Telegraph Company
    Inventors: H. Patrick Thornton, Hugh D. Dyer, Frank R. Keeler
  • Control panel
    Patent number: D272531
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: February 7, 1984
    Assignee: American District Telegraph Company
    Inventors: H. Patrick Thornton, Hugh D. Dyer, Frank R. Keeler