| Patents for F22B 5 - Steam boilers of drum type, i.e. without internal furnace or fire tubes, the boiler body being contacted externally by flue gas (271) |
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| 09/15/2004 | CN2641471Y Sectional combustion type gas and steam furnace |
| 08/25/2004 | CN2636083Y 低压锅炉 Low pressure boiler |
| 07/21/2004 | CN2627365Y Steam boiler equipped with high pressure water feeder |
| 06/02/2004 | CN2619148Y High efficiency energy saving steaming stove |
| 05/26/2004 | CN2618060Y Atmospheric steam sterilizing boiler |
| 03/24/2004 | CN1484731A Rotary nozzle turbine |
| 03/18/2004 | US20040050033 Rotary nozzle turbine |
| 01/22/2004 | DE10228595A1 Aufheizeinrichtung Heating device |
| 01/07/2004 | CN2597835Y Multipurpose simple steam boiler using two fuels |
| 12/17/2003 | CN2593062Y Ammonia oxidation oven-waste heat boiler for nitric acid production |
| 10/16/2003 | US20030192436 Method and device for the generation of steam, in particular for cooking device |
| 10/08/2003 | EP1350923A1 Rotary nozzle turbine |
| 08/13/2003 | CN2566122Y Double-water jacket vertical four-return pipeless boiler |
| 05/07/2003 | EP1307690A1 Method and device for the generation of steam, in particular for a cooking device |
| 04/02/2003 | CN1104588C Safety, energy-saving and multipurpose vertical drum boiler |
| 09/19/2002 | US20020132202 Gas water heater and method of operation |
| 08/08/2002 | DE10109251C1 Dampferzeuger, insbesondere für ein Gargerät Steam generator, particularly for a cooking appliance |
| 07/18/2002 | WO2002055844A1 Rotary nozzle turbine |
| 05/23/2002 | WO2002012790B1 Method and device for the generation of steam, in particular for a cooking device |
| 05/22/2002 | CN1085323C Gas water heater |
| 04/17/2002 | CN2486844Y Multifunction high effiicent energy saving pressureless steam boiler |
| 02/14/2002 | WO2002012790A1 Method and device for the generation of steam, in particular for a cooking device |
| 07/05/2001 | CA2295379A1 Compact gas fired humidifier |
| 03/14/2001 | CN2423481Y Horizontal internal-combustion wet-back boiler |
| 02/14/2001 | CN2419481Y Warming boiler working at atmosphere |
| 02/14/2001 | CN2419480Y 蒸气锅炉 Steam boilers |
| 02/07/2001 | CN2418351Y Foldiing-type flue boiler |
| 01/17/2001 | EP0834039B1 Energy converter using imploding plasma vortex heating |
| 11/01/2000 | CN2403997Y Industrial furnace tail flue gas utilizing apparatus |
| 08/09/2000 | CN2391099Y Unrestricted expansion internal combustion boiler |
| 06/09/1999 | EP0834039A4 Energy converter using imploding plasma vortex heating |
| 05/26/1999 | CN2320905Y Multi-purpose coal-fired steam boiler |
| 02/17/1999 | CN2308003Y Heat pipe type coal fired boiler |
| 02/17/1999 | CN2308002Y Miniature gas automatic domestic boiler |
| 12/02/1998 | CN2299232Y Coal burner of steam boiler |
| 10/14/1998 | CN2294381Y Coal-saving steam boiler |
| 09/23/1998 | CN2292216Y Coal and slag combustion device for boiler |
| 09/23/1998 | CN2292215Y No return combustion chamber oil (gas) burning boiler |
| 07/08/1998 | CN2285867Y Steam and heat transfer oil boiler |
| 04/15/1998 | CN2278856Y High-efficiency furfural electric generating steam boiler |
| 04/08/1998 | EP0834039A1 Energy converter using imploding plasma vortex heating |
| 10/15/1997 | CN2264843Y Decked and multi-chamber smoke-and dust-removing boiler |
| 09/17/1997 | CN2262648Y 锅炉 Boiler |
| 09/10/1997 | CN2262167Y Auxiliary steam generator for non-pressure boiler |
| 09/03/1997 | CN2261557Y Gas raising preheating vapor generator |
| 08/06/1997 | CN2258949Y Atmospheric pressure miniature gas hot-water boiler |
| 06/18/1997 | CN2256506Y 立式节能锅炉 Vertical saving boiler |
| 10/16/1996 | CN2237778Y Heat-pipe heat-supplying system |
| 09/18/1996 | CN1131254A Built-in water drum in boiler |
| 09/11/1996 | CN1130740A Sectional pressurizing feedwater method for boiler |
| 07/10/1996 | CN2230868Y Low pressure, high temperature and energy saving boiler |
| 05/01/1996 | CN2226198Y Vertical boiler without fire tube |
| 04/11/1996 | WO1996010716A1 Energy converter using imploding plasma vortex heating |
| 04/10/1996 | CN2224329Y Boiler with crossed-tube |
| 04/03/1996 | CN2223801Y Device for part water circulation in a boiler |
| 03/20/1996 | CN2222851Y Multifunctional domestic steam producer |
| 02/21/1996 | CN2220583Y Single-pot vertical efficient boiler |
| 02/14/1996 | CN2220010Y Coal-fired energy-saving boiler capable of producing steam and gas |
| 01/03/1996 | CN2216633Y Pressureless multi-function steam furnace |
| 12/20/1995 | CN1113562A Ultra-high efficiency on-demand water heater |
| 12/06/1995 | CN2214597Y Verticle tubes multi-return non-shell boiler |
| 12/06/1995 | CN2214596Y Angle fume duct self-burning circulation sulphuric acid waste heat boiler |
| 09/27/1995 | CN2208662Y Coal boiler for generating hot water, boiled water and steam |
| 06/28/1995 | CN2202247Y Horizontal double-drum steam boiler |
| 06/21/1995 | CN2201573Y Rocket type detatchable and easy-to-repair boiler |
| 06/07/1995 | CN2200107Y Coal-fired energy-saving boiler |
| 05/31/1995 | CN2199428Y High-efficient steam generator |
| 05/31/1995 | CN1103153A Safety, energy-saving and multipurpose vertical drum boiler |
| 05/24/1995 | CN2198503Y High efficiency steam pot with wave shape bottom and high efficiency boiler body |
| 05/24/1995 | CN2198502Y Energy saving self dust removing pressure-free boiler |
| 05/17/1995 | CN2197568Y Energy saving non-pressure boiler |
| 05/17/1995 | CN2197567Y Horizental non-pressure boiler |
| 05/17/1995 | CN2197566Y Combined circulating boiler with horizental cylinder |
| 05/17/1995 | CN2197565Y Non-pressure heating boiler |
| 05/10/1995 | CN2196737Y Steam generator |
| 05/10/1995 | CN2196736Y Vertical energy-saving dust-proof plate pressure-less stove |
| 02/22/1995 | CN2190229Y Non-pressure and energy saving vertical boiler |
| 02/08/1995 | CN2189264Y Boiler for giving hot wind and steam |
| 02/01/1995 | CN2188694Y Rocket type multi-function boiler easy to servicing |
| 01/18/1995 | CN2187732Y Superconduction normal pressure two-purpose water heating boiler |
| 01/04/1995 | CN2186855Y New structure for preventing boiler bottom hull from expanding |
| 12/07/1994 | CN2184853Y Double cavity steam boiler |
| 11/01/1994 | US5359966 Energy converter using imploding plasma vortex heating |
| 10/12/1994 | CN2179524Y Boiler jacket type boiler |
| 08/10/1994 | CN2173901Y Superimposed internal chamber boiler |
| 07/20/1994 | CN2172399Y Horizontal internally burning 3-return wet back oil-burning boiler |
| 07/06/1994 | CN1089022A Industrial vertical multipurpose safety energy-saving boiler |
| 06/15/1994 | CN2169032Y Multifunctional nonpressure boiler |
| 06/15/1994 | CN2169031Y Multiple-core vertical boiler |
| 06/01/1994 | CN2167266Y Horizontal mini boiler |
| 06/01/1994 | CN2167265Y Ambient pressure boiler with forced circulation |
| 05/18/1994 | CN2165326Y Vertical multi-flue coal boiler |
| 05/18/1994 | CN2165325Y Vertical full automatic three-return internal combustion oil (or gas) boiler |
| 05/04/1994 | CN2163938Y Multi-functional efficient water heater |
| 04/13/1994 | CN2161816Y Vacuum boiler |
| 04/06/1994 | CN2160818Y Efficient multifunctional boiler |
| 03/23/1994 | EP0587729A1 Method and apparatus for controllably generating simulated smoke |
| 01/12/1994 | CN2152974Y Cooking range steam generator |
| 01/05/1994 | CN2152143Y Steam boiler |
| 12/22/1993 | CN2150449Y Water or steam two-purpose stove |