HOT WATER HEATER
United States Patent 3492972
US Patent References:
/0192010.html
- - 0192010
/0299003.html
- - 0299003
/0218393.html
- - 0218393
/1077160.html
- - 1077160
Gas fired water heater
- - 2684054
/0192010.html
- - 0192010
/0299003.html
- - 0299003
/0218393.html
- - 0218393
/1077160.html
- - 1077160
Gas fired water heater
- - 2684054
Inventors:
Mclaren, David J.
Publication Date:
02/03/1970
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Assignee:
SMITH CORP A O
Primary Class:
Other Classes:
122/164
International Classes:
F24H1/20; F24H1/18
US Patent References:
| 3266485 | Recirculating immersion heater |