Patents by Inventor David E. Hamm

David E. Hamm 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).

  • Chain saw driven generator
    Patent number: 4217537
    Abstract: Apparatus and method employing the engine unit of a conventional chain saw to power an electrical generator. In a first embodiment, a generator is detachably mounted to the engine unit, with an endless belt drivingly connecting the two. A second embodiment includes an engine unit of the above-described type operatively connected to a vehicle-mounted alternator.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: August 12, 1980
    Inventor: David E. Hamm