| Patents for G05D 9 - Level control, e.g. controlling quantity of material stored in vessel (4,688) |
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| 03/12/2013 | US8396607 Grid responsive control device |
| 03/06/2013 | CN202771274U Fiber type petroleum overflow prevention control system |
| 03/06/2013 | CN202771273U Fiber liquid level switch controller |
| 03/06/2013 | CN202771272U Azotometer device capable of automatically supplementing water |
| 03/06/2013 | CN102955480A Method for adjusting the liquid level of liquid in continuous equipment and device thereof |
| 03/06/2013 | CN102953751A Coal-mine vertical water coal rock powder treater |
| 03/05/2013 | US8392031 System and method for load forecasting |
| 02/28/2013 | DE102011111175A1 Method for controlling relative vertical spacing between surface of processing liquid and underside of liquid in treatment zone for treatment of flat objects, involves determining actual value based on total surface area of flat object |
| 02/27/2013 | CN202758249U Novel liquid level controller structure |
| 02/19/2013 | US8377208 System and method for manufacturing polycrystal silicon |
| 02/13/2013 | CN202734927U Liquid level sensor |
| 02/13/2013 | CN202721988U Material level control device |
| 02/13/2013 | CN102135009B Automatic water discharging device |
| 02/12/2013 | US8374729 Smart electrical outlets and associated networks |
| 02/12/2013 | US8371119 Drain valve for an air intake system of a machine |
| 02/06/2013 | CN102915048A System and method for controlling coke quenching |
| 02/06/2013 | CN102915047A Side spray type floating ball switch |
| 01/31/2013 | DE102009045470B4 Vorrichtung zum Trocknen eines gasförmigen Mediums, sowie Verfahren zu deren Betreiben An apparatus for drying a gaseous medium, and methods for their operation |
| 01/30/2013 | CN202711084U Capacitance type liquid level measurement and control device with external detection capacitor connected through lead |
| 01/30/2013 | CN202711083U Fully-automatic water level controller |
| 01/30/2013 | CN202711082U 人工湿地水位调节装置 Wetland water level regulating device |
| 01/30/2013 | CN202711081U Water monitoring device and system |
| 01/30/2013 | CN202711080U Mining water level controller |
| 01/30/2013 | CN202711079U Liquid level control device used in water storage barrel |
| 01/30/2013 | CN202711078U Universal type liquid level intelligent controller |
| 01/30/2013 | CN102902283A Automatic liquid level control device of double-grid fire pool |
| 01/29/2013 | US8364324 Energy management system |
| 01/23/2013 | CN202694166U 空心球液位控制装置 Hollow ball level control device |
| 01/23/2013 | CN202694165U Automatic water tower controller |
| 01/23/2013 | CN202694164U Water level measurement controller |
| 01/23/2013 | CN202694163U Liquid level delay control switch |
| 01/23/2013 | CN102890515A Data acquisition device of filling type water receiver |
| 01/23/2013 | CN102890514A Liquid level controller with continuous light display |
| 01/23/2013 | CN102385394B Automatic monitoring unit for reservoir level |
| 01/16/2013 | CN202677208U System for controlling water level of deaerator |
| 01/16/2013 | CN202677207U High-precision glass liquid level automatic control apparatus |
| 01/16/2013 | CN202677206U Water level control device of water boiler |
| 01/16/2013 | CN202676243U Double-floating-ball type water level measuring device |
| 01/16/2013 | CN202671623U Water level automatic knockout device |
| 01/16/2013 | CN101562254B Fuel supply device for fuel cell and fuel cell system using the same |
| 01/15/2013 | US8355826 Demand side management module |
| 01/15/2013 | US8355825 Wind farm |
| 01/15/2013 | US8355823 Method and system for controlling operation of a wind turbine |
| 01/10/2013 | US20130013099 Storage of respiratory produce |
| 01/09/2013 | CN202661891U Foundation pit accumulated water control system based on Android technology |
| 01/09/2013 | CN202661890U Liquid level control device and automatic liquid level control system equipped with liquid level control device |
| 01/09/2013 | CN202661889U Water controller |
| 01/09/2013 | CN202661888U Measuring tank |
| 01/09/2013 | CN102866714A Novel automatic water injector |
| 01/08/2013 | US8352095 Electric power generation device, electric power demand device, and electric power control system, and method of controlling electric power |
| 01/08/2013 | US8352093 Intra-area environmental control system and intra-area environmental control method |
| 01/02/2013 | CN202649833U High-low temperature alternation humidity coldness test box |
| 01/02/2013 | CN202649832U Two-wire type water level controller |
| 01/02/2013 | CN202649831U Float liquid level switch and external water pump having the same |
| 01/02/2013 | CN202649830U Underground channel liquid level controlling device |
| 01/02/2013 | CN202649829U Automatic water level control device |
| 01/02/2013 | CN202649828U Fluctuation type slurry forming liquid level control system |
| 01/02/2013 | CN202649827U Water level automatic controller |
| 01/02/2013 | CN102854899A Water tower water level monitoring system |
| 01/02/2013 | CN102854898A Novel floater type liquid level automatic control device |
| 01/02/2013 | CN102854034A Fluid sample collection device |
| 01/02/2013 | CN102849895A Domestic sewage denitrification system and control method thereof |
| 12/26/2012 | CN202632130U Over-distance wireless water level controller |
| 12/26/2012 | CN202632129U 浮球液位控制器 Float Level Controller |
| 12/26/2012 | CN202632128U Mineral anti-overflowing device having fault self-detection function |
| 12/26/2012 | CN202632127U Liquid level automatic control device for glass fiber reinforced plastic tank of fine vinegar |
| 12/26/2012 | CN202632126U Device for automatically controlling liquid level of liquid pool |
| 12/26/2012 | CN202632125U Metering tank liquid level automatic control device |
| 12/25/2012 | US8340830 Onboard management of movable asset for asset protection |
| 12/25/2012 | US8340829 Method and apparatus of detecting and compensating for DC residual fault currents on electrical systems |
| 12/25/2012 | US8340827 Methods for controlling time scale of gas delivery into a processing chamber |
| 12/19/2012 | CN102830719A Optical fiber type anti-oil spillage control system and control method |
| 12/12/2012 | CN202600504U Wireless receiving control water-storing device |
| 12/12/2012 | CN202600503U Automatic liquid-level control device |
| 12/12/2012 | CN202600502U Vertical type liquid level controller |
| 12/12/2012 | CN202600501U Vertical type liquid level controller |
| 12/12/2012 | CN202594878U Tail water treatment device for automatic water selling machine in community |
| 12/12/2012 | CN102822758A Filling level regulation |
| 12/11/2012 | US8332077 Controller and control method for a wind farm including a plurality of wind turbine generators |
| 12/05/2012 | CN202583904U Liquid level automatic control structure |
| 12/05/2012 | CN202583903U Capacitive liquid level controller |
| 12/05/2012 | CN202583902U Water level controller with time-delay protection |
| 12/05/2012 | CN202583901U Measuring and control device for hydraulic oil level of brick machine |
| 12/05/2012 | CN202572648U Material feeding control system and engineering machinery using same |
| 12/05/2012 | CN102809974A Distributed liquid level monitoring system based on wireless detection |
| 12/05/2012 | CN102169351B Maintenance-free high liquid level control system and method of ballast |
| 12/04/2012 | US8326589 Stable equilibrium point (SEP) calculation apparatus of power system |
| 11/28/2012 | CN202563351U Controller for level measurement of multiple coal bunkers |
| 11/28/2012 | CN202563066U Anti-overflow alarm device for waste liquid discharge groove and control device for waste liquid discharge groove |
| 11/28/2012 | CN101216700B Electric home appliance having drain function and method of controlling the same |
| 11/22/2012 | WO2012156371A1 Device for measuring a quantity of a reducing agent, preferably nh3, contained in a vessel |
| 11/21/2012 | CN202548656U Liquid level detecting and controlling device of scrubbing tower |
| 11/21/2012 | CN202548655U Fully automatic pit motor anti-flooding device |
| 11/21/2012 | CN202548654U Water tower automatic water-supply controller |
| 11/21/2012 | CN202548653U Household water tower automatic water injection device |
| 11/21/2012 | CN202548652U Automatic water tower level control device |
| 11/21/2012 | CN102789244A Tide simulation monitoring system and monitoring method thereof |
| 11/20/2012 | US8315743 Network centric power flow control |
| 11/20/2012 | US8315742 System and method of loadflow calculation for electrical power system |
| 11/20/2012 | US8315717 Method and apparatus for actively managing consumption of electric power supplied by an electric utility |