Patents by Inventor Barend J. du Plooy

Barend J. du Plooy 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 water heater
    Patent number: D258608
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: March 17, 1981
    Assignee: Shell South Africa (Proprietary) Ltd.
    Inventor: Barend J. du Plooy