| Patents for F22B 11 - Steam boilers of combined fire-tube type and water-tube type, i.e. steam boilers of fire-tube type having auxiliary water tubes (113) | |
|---|---|
| 04/1992 | |
| 04/01/1992 | CN2100558U Vertical fire/water tube boiler |
| 06/1991 | |
| 06/19/1991 | CN2079256U Improved water/fire tube pot type boiler |
| 06/12/1991 | CN2078841U Gas-fired boiler |
| 05/1991 | |
| 05/15/1991 | CN2077080U Horizontal superheated vapor boiler with fast mounted chain fire grate |
| 10/1989 | |
| 10/05/1989 | WO1989009363A1 Steam boiler and use hereof |
| 11/1988 | |
| 11/16/1988 | CN87207837U Dual-purpose high-temp. water and steam generating boiler with lignite-burning capability |
| 12/1987 | |
| 12/23/1987 | CN86204561U Fast thermal-gathering boiler |
| 07/1986 | |
| 07/02/1986 | CN85201472U Low-pressure aluminium steam boiler |
| 05/1984 | |
| 05/29/1984 | CA1168120A1 Steam generator |
| 01/1981 | |
| 01/27/1981 | CA1094410A1 Hot water or steam boiler |
| 10/1979 | |
| 10/23/1979 | US4171685 Hot water or steam boiler |
| 11/1978 | |
| 11/07/1978 | US4123995 Hot water or steam boiler |
| 10/1978 | |
| 10/17/1978 | CA1040495A1 Hot water or steam boiler |
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