Patents by Inventor Elvin W. Keith

Elvin W. Keith 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 collector cover
    Patent number: 4141185
    Abstract: An improved solar collector cover for reducing energy loss in flat plate solar collectors is disclosed. The cover provides a solar radiation transmitting material containing a plurality of sealed evacuated passageways or cavities.
    Type: Grant
    Filed: May 18, 1977
    Date of Patent: February 27, 1979
    Inventor: Elvin W. Keith