Patents by Inventor Manfred Hirth

Manfred Hirth 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).

  • Starter protection circuit
    Patent number: 5239954
    Abstract: A starter protection circuit for a starting device of an internal combustion engine of a vehicle has a thermoswitch assignable to a starter, a relay which is activated by the thermoswitch when the thermoswitch is operative and interrupts a starter operation and a relay operating key which after assumption of a cold switching state of the thermoswitch can operate again the starter.
    Type: Grant
    Filed: December 12, 1991
    Date of Patent: August 31, 1993
    Assignee: Robert Bosch GmbH
    Inventors: Karlheinz Boegner, Manfred Hirth, Klaus Bolenz