Patents by Inventor Hal Larson

Hal Larson 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).

  • Wood burning stove with integral forced air heat exchanger system
    Patent number: 4261324
    Abstract: A stove having an integral heat exchanger and a fan unit for forcing air through the heat exchanger and into a room where the stove is situated through hot air outlet openings in the stove front which are covered by perforated ceramic decorative cover plates. The heat exchanger extends along the rear and side walls of the stove and comprises a conduit of welded sheet metal construction similar to that of the stove walls wherein portions of the stove side walls also serve as the sides of the heat exchanger conduit. The decorative cover plates are retained in position by elastically deformable wire clips which partially encircle an edge of each cover plate and frictionally engage an outwardly projecting lip surrounding the hot air outlet openings of the heat exchanger conduit.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: April 14, 1981
    Assignee: Woodcutters Manufacturing, Inc.
    Inventor: Hal Larson
  • Manifold for a forced air fireplace furnace
    Patent number: D258756
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: March 31, 1981
    Assignee: Woodcutters Manufacturing, Inc.
    Inventor: Hal Larson
  • Wood burning stove insert for fireplace
    Patent number: D263993
    Type: Grant
    Filed: February 29, 1980
    Date of Patent: April 20, 1982
    Assignee: Woodcutters Manufacturing, Inc.
    Inventor: Hal Larson