| Patents for G05D 9 - Level control, e.g. controlling quantity of material stored in vessel (4,688) |
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| 02/26/2002 | CA2272502C Resistive fluid level sensing and control system |
| 02/06/2002 | CN2476001Y Floating ball liquid level controller |
| 01/30/2002 | CN2475006Y Automatic controlling device for displaying water level and water temperature of water tank |
| 01/10/2002 | WO2002003039A1 Automatic boiler level controller |
| 12/26/2001 | CN2468081Y Automatic controlling device for water tank level |
| 12/19/2001 | CN2466693Y Improved water level controlling device with double float |
| 12/19/2001 | CN2466196Y Washer with water inlet valve controlled by serial water level switch |
| 12/12/2001 | CN2465217Y Float ball switch |
| 12/12/2001 | CN2465156Y 电子液位控制器 Electronic level controller |
| 12/06/2001 | WO2001092834A1 Method and apparatus for controlling the level of liquids |
| 12/04/2001 | US6325851 Crystal manufacturing apparatus and method |
| 12/04/2001 | US6325094 Self-metering reservoir |
| 12/04/2001 | US6325093 Water distributing installation controllers |
| 11/28/2001 | CN2462438Y Near switch sensing grinding roller clutch brake controller |
| 11/28/2001 | CN2462437Y Valve-less self-controlling liquid constant level device |
| 11/28/2001 | CN2462363Y 液位控制器 Level Controller |
| 11/21/2001 | CN2461032Y Liquid level automatic control device |
| 11/21/2001 | CN2459999Y Cup with loudspeaker at bottom for blind person |
| 11/15/2001 | WO2001021897A3 Fluid control systems |
| 11/14/2001 | CN2459634Y Water level control and test device |
| 11/14/2001 | CN2459633Y Automatic water level controller |
| 11/14/2001 | CN2459630Y Controller for liquid flow meter |
| 11/06/2001 | US6311723 Flow control valve assembly |
| 11/06/2001 | US6311711 Method of regulating the level in a buffer tank |
| 10/31/2001 | CN2457638Y Pressure type liquid level automatic regulator |
| 10/25/2001 | US20010032869 Wave soldering method and system used for the method |
| 10/25/2001 | US20010032505 Liquid-level detection method and device thereof |
| 10/24/2001 | EP1148318A2 Automatic liquid level detection device |
| 10/24/2001 | CN1318740A Level detecting method and device |
| 10/10/2001 | CN2453405Y Automatic indicating and control device for branch water tank in oil dipping factory |
| 10/10/2001 | CN2453404Y Float centre lathe type water level control valve for electric water boiler water receiver |
| 10/10/2001 | CN2453403Y Photoelectric digital water level detector for solar energy water heater and its overflow detector |
| 10/10/2001 | CN1316681A Solid-state liquid sensor and pump controller |
| 10/03/2001 | CN2452046Y Liquid level self-control device |
| 10/03/2001 | CN2451595Y Suger juice evaporating system low-level controlling apparatus |
| 09/27/2001 | WO2001071297A1 Continuous liquid flow system |
| 09/26/2001 | EP1136701A1 Solid state liquid level sensor and pump controller |
| 09/26/2001 | CN2450694Y 机械式水位控制器 Mechanical water level controller |
| 09/19/2001 | CN2449264Y Spiral type liquid level regulator |
| 09/19/2001 | CN2449263Y Water level automatic controller |
| 09/18/2001 | US6289971 Mold level control apparatus of continuous casting facility |
| 09/12/2001 | EP0995084A4 Bulk materials loading device |
| 09/12/2001 | CN2447814Y Water level control multi-functional protector for three-phase submersible electric pump |
| 09/12/2001 | CN2447753Y Floating ball level controller |
| 09/12/2001 | CN2447752Y Marine floating ball level controller |
| 09/05/2001 | CN2446551Y Fully automatic double liquid level controller |
| 09/05/2001 | CN2446550Y Automatic liquid level controller |
| 09/05/2001 | CN2446499Y Water level and temp controller |
| 08/30/2001 | WO2001062590A1 Method for determining a minimal set of rotor blade adjustments |
| 08/29/2001 | CN2445359Y Intelligent water feeding control instrument for solar water heater |
| 08/23/2001 | WO2001061429A1 Method and system for automatically controlling water level in storage tank through wireless control process |
| 08/22/2001 | CN2444214Y Liquid level controlling bar |
| 08/22/2001 | CN1069962C Flow controller of cooling agent |
| 08/21/2001 | US6276894 Method and device for drawing condensate off from compressed-gas systems |
| 08/15/2001 | CN2443405Y Automatic switch controller of pump for water tank |
| 08/15/2001 | CN2443404Y Mined flame-proof switch capable of automatically controlling water level |
| 08/15/2001 | CN2443352Y Magnetic float type water level auto-controller |
| 08/14/2001 | US6273319 Wave soldering method and system used for the method |
| 08/08/2001 | CN2442298Y Self control water level valve of solar water heater |
| 08/01/2001 | CN2441123Y Automatic level controller |
| 07/25/2001 | CN1305130A Ring-shaped automatic water level controller |
| 07/24/2001 | US6263906 Overflow proof fluid level controller |
| 07/24/2001 | US6263905 Automatic regulating valve apparatus |
| 07/18/2001 | CN2439668Y Self-flor type device for automatically controlling level of liquid |
| 07/17/2001 | US6260588 Bulk chemical delivery system |
| 07/17/2001 | US6260424 Stand free multi-beamed load cell |
| 07/11/2001 | CN2439052Y Electronic water level self-controlling device |
| 06/27/2001 | CN2436958Y Automatic water cutting off apparatus for water tank of solar energy water heater |
| 06/27/2001 | CN2436922Y Self-powering crane-pipe liquidlevel controller |
| 06/20/2001 | CN2435769Y Liquid level controller |
| 06/06/2001 | CN2433653Y Automatic control device for level of water tank |
| 06/06/2001 | CN2433652Y Under water control device for liquid filter |
| 05/29/2001 | CA2037725C Low friction trunnion bearing and high pressure seal |
| 05/09/2001 | CN2429820Y Automatic water level controller |
| 05/01/2001 | US6223595 Resistive fluid level sensing and control system |
| 05/01/2001 | US6223359 Automatic water level system for swimming pools |
| 04/25/2001 | CN2427831Y Device for automatic control of water tower liquid |
| 04/25/2001 | CN1292911A Liquid level control system |
| 04/18/2001 | EP1093042A1 Liquid treatment device with storage tank and delivery tank |
| 04/04/2001 | CN2426139Y Induction type liquid level controller |
| 03/29/2001 | WO2001021897A2 Fluid control systems |
| 03/28/2001 | EP0891520A4 Fuzzy logic liquid level control |
| 03/27/2001 | US6206025 Device and method for removing condensate from gas pressure systems |
| 03/21/2001 | CN2424481Y Liquid level electronic auto-controller |
| 03/20/2001 | US6202676 Magnetic liquid control for boiler feedwater receivers |
| 03/14/2001 | CN2423604Y Auxiliary electric heating controller for solar water heater |
| 03/13/2001 | US6199684 Bulk materials loading device |
| 03/08/2001 | WO2001016591A1 Apparatus and method for detecting the level of a mud bed |
| 02/28/2001 | CN2421624Y Water level auto-controller |
| 02/28/2001 | CN1285324A Automatic controller for sewage treatment process |
| 02/27/2001 | US6192920 Chain link float valve |
| 02/21/2001 | CN2420669Y Civil hydraulic automatic water supply switch |
| 02/21/2001 | CN2420668Y Floating hammer type constant position automatic liquid feeder |
| 02/14/2001 | CN2419614Y Automatic liquid-level control device for high-pressure generator |
| 02/14/2001 | CN2419582Y Level control system of water tank with inner mercury switch float |
| 02/07/2001 | CN2418505Y Controlled apparatus of process-control comprehensive experiment system |
| 01/31/2001 | EP1072968A2 Method to produce devices to control the level or volume of water for domestic appliances and control devices thus obtained |
| 01/31/2001 | CN2417463Y Electrode high resistance liquid level detecting switch |
| 01/24/2001 | CN2416523Y Drainage self-controlling device |
| 01/24/2001 | CN2415706Y Double-floating ball mineral spring pot |