Patents by Inventor John C. Crenshaw

John C. Crenshaw 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).

  • Clock
    Patent number: D247741
    Type: Grant
    Filed: August 19, 1976
    Date of Patent: April 18, 1978
    Assignee: General Time Corporation
    Inventors: Ellworth R. Danz, John C. Crenshaw
  • Timer
    Patent number: D251058
    Type: Grant
    Filed: April 1, 1977
    Date of Patent: February 13, 1979
    Assignee: General Time Corporation
    Inventors: Ellworth R. Danz, John C. Crenshaw
  • Housing for alarm device
    Patent number: D259926
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: July 21, 1981
    Assignee: General Time Corporation
    Inventors: Ellworth R. Danz, John C. Crenshaw