Patents by Inventor Adriaan Z. A. Briel

Adriaan Z. A. Briel 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).

  • Reflux valve
    Patent number: 4182355
    Abstract: A reflux valve comprising a body having a passage communicating between an inlet and an outlet, a movable valve seat and closure member therefor within the body wherein the said valve seat is movable in a substantially axial direction.
    Type: Grant
    Filed: September 1, 1977
    Date of Patent: January 8, 1980
    Inventors: Adriaan Z. A. Briel, John Charnock