Patents by Inventor James N. Hubenthal

James N. Hubenthal 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).

  • Patent number: 5438712
    Abstract: The present invention is a hot tub heater system. The hot tub heater system is comprised of a hot tub having water within. The hot tub heater system is also comprised of means for heating the water within the hot tub. The heating means comprises a hot water heater which heats a body of water within a tank and means for transferring heat from the water within the tank to the water of the hot tub without any intermixing. Preferably, the heat transferring means comprises a piping assembly which acts as a heat exchanger. The piping assembly can be a variety of different forms. The present invention allows a hot tub to be heated inexpensively with a domestic hot water heater.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: August 8, 1995
    Inventor: James N. Hubenthal