| Patents for F04D 25 - Pumping installations or systems specially adapted for elastic fluids (17,127) |
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| 07/11/1990 | CN1008762B Joint process of powder alloy swing gear and steel shaft as well as die thereof |
| 07/04/1990 | CN2058939U Miniature electric fan |
| 06/20/1990 | CN2058432U Electric fan for mosquito net |
| 06/20/1990 | CN2058428U Explosion-proof local ventilator combined controlling box |
| 06/13/1990 | EP0372718A1 Air pump |
| 06/06/1990 | CN2057974U Ventilation fan with the function of removing flies and mosquitoes |
| 06/06/1990 | CN2057973U Moving angle regulating device for electric fan |
| 05/31/1990 | DE3839752A1 Starting coupling (clutch) for a single-phase synchronous motor |
| 05/30/1990 | CN2057713U Miniature domestic scavenging fan |
| 05/30/1990 | CN2057712U Ensemble multi-magnet ring type electric fan |
| 05/30/1990 | CN2057711U Non-lubricating nitrogen compressor |
| 05/23/1990 | CN2057474U Explosion-proof axial-flow ventilator for mine |
| 05/23/1990 | CN2057316U Safety helmet with fan |
| 05/22/1990 | US4927324 Ducted fan |
| 05/22/1990 | US4927120 Portable electrical fan |
| 05/17/1990 | DE3838149A1 Supercharging system for an internal combustion engine |
| 05/16/1990 | CN2057243U Omnibearing electric fan |
| 05/16/1990 | CN2057242U Combined multipurpose fan |
| 05/16/1990 | CN2057241U Roof ventilator |
| 05/15/1990 | US4925368 Turbo-compressor having air-cooled bearing |
| 05/10/1990 | DE3916791A1 Fan unit for vehicle heating system - has socket with adjacent seatings for fan motor and motor control module |
| 05/10/1990 | DE3837545A1 Forced air blower |
| 05/09/1990 | CN2056947U Foldable breeze ceiling fan with adjustable blowing rate |
| 05/08/1990 | US4922766 Electric fan apparatus |
| 05/02/1990 | CN2056706U Wind introducing machine |
| 05/02/1990 | CN2056705U Day light lamp hanging fan |
| 05/01/1990 | US4920929 Variable speed coupling system for cooling an engine |
| 04/25/1990 | EP0365343A2 Shutter mechanisms |
| 04/25/1990 | CN2056463U Electric fan for use in mosquito net |
| 04/25/1990 | CN2056462U Miniature dust catcher |
| 04/25/1990 | CN2056461U Pocket electric fan |
| 04/25/1990 | CN2056460U Low voltage radial-flow ventilator blate |
| 04/25/1990 | CN2056459U Suction on ceilling type electric fan with lamp |
| 04/25/1990 | CN2056458U Electric fan for breeze |
| 04/25/1990 | CN2056457U No mechanical friction spark ventilating fan |
| 04/25/1990 | CN2056456U Multifunctional strong exhaust fan |
| 04/25/1990 | CN1041640A Ceiling fan assembly |
| 04/24/1990 | US4919247 Thermosensitive fluidized fan coupling device |
| 04/18/1990 | EP0364329A1 Ventilating device for incubators |
| 04/18/1990 | CN2056198U Ceiling fan with speed-regulating switch |
| 04/18/1990 | CN1041429A Anti-corrosion spray technology for blower |
| 04/11/1990 | CN2055875U Belt tightener of outboard motor of axial-flow fan |
| 04/10/1990 | CA1267690A1 Ironless brushless dc motor with wave winding |
| 04/05/1990 | WO1990003522A1 Ceiling fan assembly |
| 04/04/1990 | CN2055545U Wide-angle moderate-breeze electric fan |
| 03/28/1990 | CN2055198U Ceiling blower with external motor |
| 03/28/1990 | CN2055197U Explosion-proof local ventilation blower used in coal mine |
| 03/28/1990 | CN2055196U Dual purpose machine for oxygen enhancement and water pumping |
| 03/21/1990 | CN2054852U Variable angle electric fan |
| 03/21/1990 | CN2054851U Dual purpose device used as electric fan and toys |
| 03/21/1990 | CN2054850U Water wheels fan |
| 03/21/1990 | CN1040662A Natural wind fan |
| 03/20/1990 | US4909711 Small fan with electric drive motor |
| 03/14/1990 | CN1040418A Dual-purpose utensil for fanning and shaving |
| 03/13/1990 | US4907654 Water driven fan system for firefighting |
| 03/08/1990 | DE3828852A1 Ventilating device |
| 03/07/1990 | CN2054098U Wide-angle zephyr (ceiling) fan |
| 03/06/1990 | US4906164 Hand-portable fire fighting, positive pressure blower |
| 02/28/1990 | CN2053691U Peculiar smell remover for enclosed closet |
| 02/28/1990 | CN2053690U Discharge fan |
| 02/28/1990 | CN2053689U Head-tilting ceiling fan |
| 02/21/1990 | CN2053267U Miniature fan with mechanical oriented device and starter |
| 02/21/1990 | CN2053266U Multifunctional ac/dc travelling fan |
| 02/21/1990 | CN1006928B Electric fan |
| 02/20/1990 | US4902199 Apparatus for moving air |
| 02/14/1990 | CN2052832U Safety breeze ceiling fan |
| 02/14/1990 | CN2052831U Water showering cooling fan |
| 02/13/1990 | US4900236 Ceiling fan |
| 02/13/1990 | US4899740 Respirator system for use with a hood or face mask |
| 02/07/1990 | EP0353744A2 Air cooler |
| 02/07/1990 | CN2052453U Multi-purpose pocket electric fan |
| 02/07/1990 | CN1039470A Contrifugal pressure expanding propeller |
| 01/31/1990 | EP0352743A1 Brake mechanism for vehicles |
| 01/31/1990 | CN2052078U 电扇 Electric fan |
| 01/31/1990 | CN2052077U Small-sized fan capable of diffusing fragrance |
| 01/31/1990 | CN2052076U Multi-functional breezy electric fan |
| 01/31/1990 | CN2052075U Keep-fit breezy electric fan |
| 01/31/1990 | CN2052074U Electric fragrance diffuser |
| 01/31/1990 | CN2052073U Single speed ac electric fan |
| 01/24/1990 | EP0352113A2 Forced-ventilation filtration device |
| 01/24/1990 | CN2051686U High efficiency, low pressure axial flow ventilator |
| 01/24/1990 | CN2051685U Centrifugal type ventilator |
| 01/24/1990 | CN2051684U Backward bending type high pressure centrifugal ventilator |
| 01/17/1990 | CN2051299U Micro-type alternating/direct current dual-purpose blower for honeycomb briquette stove |
| 01/17/1990 | CN2051298U Micro-type clampable electric fan |
| 01/16/1990 | US4893995 Electric motor-driven impeller-type air pump |
| 01/09/1990 | USRE33142 Centrifugal compressor |
| 01/03/1990 | CN2050492U Detachable fan fundation support |
| 01/03/1990 | CN2050491U Warm-keeping ventilation fan |
| 01/03/1990 | CN2050490U Soft wind electric fan |
| 01/03/1990 | CN2050489U Houshold soft shaft transsmition air intake machine |
| 01/03/1990 | CN2050488U Fan with multiple direction of air output |
| 12/28/1989 | WO1989012753A1 Multi-stage turbo-compressor |
| 12/28/1989 | WO1989012751A1 Multi-stage vacuum-pump set |
| 12/27/1989 | EP0347706A1 Multistage vacuum pump unit |
| 12/27/1989 | CN2050102U Hand direct current fan |
| 12/20/1989 | CN2049702U Gentle breeze ceiling fan with folding vanes |
| 12/20/1989 | CN2049701U Multi-vane ceiling fan |
| 12/13/1989 | EP0345796A2 Ventilator driven by an electric motor |
| 12/13/1989 | CN2049287U Gentle breeze compact type ceiling fan |