Patents by Inventor Donald E. Woollen, Jr.

Donald E. Woollen, Jr. 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).

  • Submersible high-efficiency combustion chamber for a water heater
    Patent number: 5207212
    Abstract: An apparatus for heating water in a water tank includes a first tubular member and a second tubular member that has an input end and an exhaust end. The second tubular member is disposed at least in part within the first tubular member to form an annular clearance space therebetween. A burner is coupled to the input end of the second tubular member and supplies gases produced by combustion to the interior of the second tubular member.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: May 4, 1993
    Inventor: Donald E. Woollen, Jr.