Patents by Inventor Douglad A. Wilke

Douglad A. Wilke 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).

  • Solar energy air roof
    Patent number: 4284070
    Abstract: A ready-to-assemble kit for a solar air heater including (a) a prefabricated, substantially closed heating chamber to be disposed upon a base member, (b) guide strips to be secured to the base member around the perimeter of the chamber, and (c) glazing supports having elongated slots along their bottoms, which slots are keyed to snuggly fit over the guide strips.
    Type: Grant
    Filed: February 6, 1980
    Date of Patent: August 18, 1981
    Inventor: Douglad A. Wilke