Patents by Inventor Donald L. Johannsen

Donald L. Johannsen 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).

  • Air conducting mechanism
    Patent number: 4351163
    Abstract: An air conducting mechanism for receiving evaporatively cooled air from a source thereof and delivering the evaporatively cooled air to the air inlet face of the condenser coil of a remotely located refrigeration unit.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: September 28, 1982
    Inventor: Donald L. Johannsen