the tubes being placed in layers

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Patents Grantslast 30 patents

Information Patent Grant
Package water tuble boiler having two offset drums
- Patent number 6,901,887
- Issue date Jun 7, 2005
- John R. English
- F22 - STEAM GENERATION
Information Patent Grant
3736907
- Patent number 3,736,907
- Issue date Jun 5, 1973
- F22 - STEAM GENERATION
Information Patent Grant
3693598
- Patent number 3,693,598
- Issue date Sep 26, 1972
- F22 - STEAM GENERATION
Information Patent Grant
3664309
- Patent number 3,664,309
- Issue date May 23, 1972
- F22 - STEAM GENERATION
Information Patent Grant
3382848
- Patent number 3,382,848
- Issue date May 14, 1968
- F22 - STEAM GENERATION
Information Patent Grant
3332402
- Patent number 3,332,402
- Issue date Jul 25, 1967
- F22 - STEAM GENERATION
Information Patent Grant
3149614
- Patent number 3,149,614
- Issue date Sep 22, 1964
- F22 - STEAM GENERATION
Information Patent Grant
3022774
- Patent number 3,022,774
- Issue date Feb 27, 1962
- F22 - STEAM GENERATION
Information Patent Grant
2088456
- Patent number 2,088,456
- Issue date Jul 27, 1937
- F22 - STEAM GENERATION
Information Patent Grant
1855575
- Patent number 1,855,575
- Issue date Apr 26, 1932
- F22 - STEAM GENERATION