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David O. Watts
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Tulsa, OK, US
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last 30 patents
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Patent Grant
Demand hot water system
Patent number
4,773,390
Issue date
Sep 27, 1988
The Quik Company
David O. Watts
F24 - HEATING RANGES VENTILATING
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Patent Grant
Disposal of oxides of nitrogen and heat recovery in a single self-c...
Patent number
4,244,325
Issue date
Jan 13, 1981
John Zink Company
Wallace F. Hart
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL