Patents by Inventor Donald D. Colee

Donald D. Colee 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).

  • Pressure differential valve for swimming pool
    Patent number: 3988787
    Abstract: A two-way valve operated by a pressure differential existing in the fluid lines controlled by the valve for use in swimming and therapeutic pool systems.
    Type: Grant
    Filed: May 29, 1975
    Date of Patent: November 2, 1976
    Inventor: Donald D. Colee