Patents by Inventor Ing Grun

Ing Grun 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).

  • Heating method and apparatus
    Patent number: 4307776
    Abstract: Process and equipment for the exchange of heat between flows of a medium flowing in and out of a building, and facade assemblies in which the process is implemented.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: December 29, 1981
    Inventors: Wolfgang Grun, Ing Grun