Patents by Inventor Donald B. Griffith

Donald B. Griffith 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).

  • Electric starting system
    Patent number: 4415812
    Abstract: An electric starting system for cranking an internal combustion engine by an electric cranking motor. The system prevents energization of the cranking motor following initial energization and subsequent deenergization by sensing the voltage generated by the cranking motor when it is deenergized and preventing reenergization of the cranking motor until this voltage drops to some value indicative of a low cranking motor speed.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: November 15, 1983
    Assignee: General Motors Corporation
    Inventors: Donald B. Griffith, Timothy C. Alexander