Patents by Inventor Richard J. Gilham

Richard J. Gilham 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).

  • Solid fuel burning heater
    Patent number: 4941451
    Abstract: A heater for the burning of wood or other similar fuels in a fire box. The fire box has a door at the front, there being a primary air inlet to the fire box above the door. The fire box also has a secondary air inlet at the rear and a tertiary inlet at the top. The heater has a double skin so that all air for the secondary and tertiary inlets passes between the two skins so that it is pre-heated.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: July 17, 1990
    Inventor: Richard J. Gilham