Patents by Inventor Roy D. Barker

Roy D. Barker 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 heat collector
    Patent number: 4170222
    Abstract: A solar heat collector constructed from transparent material utilizes a circulating absorptive fluid medium to collect solar energy. The collector comprises a plurality of cascaded fluid reservoirs, each reservoir having a self-draining feature active during a stagnant condition.
    Type: Grant
    Filed: August 19, 1977
    Date of Patent: October 9, 1979
    Inventor: Roy D. Barker