with both auxiliary water tubes and auxiliary fire tubes

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Patents Grantslast 30 patents

Information Patent Grant
Boiler with heating blower
- Patent number 11,035,588
- Issue date Jun 15, 2021
- Young-Hwan Choi
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Combustion apparatus
- Patent number 4,240,378
- Issue date Dec 23, 1980
- Peter B. Caplin
- F22 - STEAM GENERATION
Information Patent Grant
3638621
- Patent number 3,638,621
- Issue date Feb 1, 1972
- F22 - STEAM GENERATION
Information Patent Grant
3369527
- Patent number 3,369,527
- Issue date Feb 20, 1968
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
3107656
- Patent number 3,107,656
- Issue date Oct 22, 1963
- F24 - HEATING RANGES VENTILATING