Patents by Inventor Donald J. Asp

Donald J. Asp 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).

  • Combination forced air furnace and air cooler
    Patent number: 4293032
    Abstract: A single housing contains heating and air cooling units but in separate chambers and a single blower is selectively movable to force air into and through the respective chambers as desired for cooling or heating and outlets from the separate chambers to a common plenum are closed off depending upon which of the chambers is being fed by the blower.
    Type: Grant
    Filed: December 6, 1979
    Date of Patent: October 6, 1981
    Inventor: Donald J. Asp