| Patents for G05D 9 - Level control, e.g. controlling quantity of material stored in vessel (4,688) |
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| 03/13/1991 | CN2073128U Self-limit solution feeder |
| 03/06/1991 | CN2072698U Full-automatic water tank, body of water interlock control device |
| 02/27/1991 | CN2072243U Auto-controller for level |
| 02/13/1991 | CN2071355U Limit device of liquid level |
| 02/06/1991 | CN2070924U Ac electrode water level controller |
| 02/06/1991 | CN2070923U Automatic liquid infusion apparatus |
| 01/30/1991 | CN2070469U Liquid level automatic measuring and controlling device |
| 01/16/1991 | CN2069579U Long-distance liquid level controller |
| 01/09/1991 | EP0407283A1 Liquid accumulator under high pressure with regulated liquid level |
| 01/09/1991 | CN2069132U Automatic liquid level control arrangement |
| 01/08/1991 | US4982606 Fluid level sensor and controller |
| 12/26/1990 | CN2068252U Automatic control unit for liquid level |
| 12/25/1990 | US4979545 Bubbler container automatic refill system |
| 12/19/1990 | EP0403255A2 Automotive oil level control valve apparatus |
| 12/11/1990 | US4976091 Method and apparatus for filling tubes |
| 11/28/1990 | EP0399967A2 Pneumatic device for level detection of a liquid and the control thereof |
| 11/27/1990 | CA1277007C Liquid level sensor |
| 11/20/1990 | CA1276602C Device for delivering a predetermined dose of a liquid |
| 11/07/1990 | CN1046803A Method regulating level of mixture of flowable material in container having outlet |
| 10/31/1990 | EP0394869A2 Method for controlling the level of a mixture consisting of at least two components of fluid material in a container with an outlet |
| 10/31/1990 | CN2064905U Two-place type water level automatic controller |
| 10/24/1990 | EP0393687A1 Method and apparatus for filling tubes |
| 10/24/1990 | CN2064516U Float level displaying and controlling devices |
| 10/16/1990 | CA1275225C Laundry tub pressure switch control means |
| 10/13/1990 | CA2014425A1 Automatic rate matching system |
| 10/09/1990 | US4961456 Automatic control system for filling beverage containers |
| 10/03/1990 | CN2063248U 液位控制器 Level Controller |
| 09/26/1990 | EP0389460A2 System allowing exchange of containers while in operation |
| 09/25/1990 | US4958665 Apparatus for adjusting level of liquid to be filled into packaging tube |
| 09/20/1990 | CA2011628A1 System for exchanging containers while in operation |
| 09/12/1990 | EP0386703A2 Controller for underwater pump |
| 09/12/1990 | CN2062073U Liquid lever automatic controlling and alarming device |
| 09/11/1990 | US4956763 Portable self-contained surge level controller |
| 09/06/1990 | CA2010392A1 Fluid level sensor and controller |
| 09/05/1990 | EP0385032A2 Reactor coolant monitoring |
| 09/05/1990 | EP0175082B1 Circuit arrangement for the controlled filling and refilling of a tank with liquids |
| 08/22/1990 | CN2060905U Rotary damping wing panel with the function of automatic developing |
| 08/16/1990 | EP0381824A1 Apparatus for preventing the accumulation of slags, in the prechamber of a pressure-switch |
| 07/31/1990 | US4944336 Automatic control system for filling beverage containers |
| 07/31/1990 | US4944335 Level sensing system |
| 07/31/1990 | CA1272267A1 Automatic control system for filling beverage containers |
| 07/18/1990 | CN2059517U Auto-controlled protector for water distillator |
| 07/11/1990 | CN2059253U Automatic controller for the liquid level of glass fibre wire drawing |
| 07/11/1990 | CN2059252U Automatic sampler for rain |
| 07/11/1990 | CN2059251U Full automatic water feeding controller |
| 07/11/1990 | CN2059250U Electronic disply device for the height of liquid level |
| 06/27/1990 | CN2058769U Fully-automatic and multifunctional contactless liquid-level controlling instrument |
| 06/20/1990 | EP0373809A2 Ultrasonicc bilge pump control device |
| 05/10/1990 | DE3837765A1 Method and device for the control of the filling level of an air separator |
| 05/09/1990 | CN2057009U Auto-controller for level in water tower |
| 05/09/1990 | CN2057008U Controller for liquid level |
| 05/09/1990 | CN2057007U Computerised monitoring instrument for oil depot |
| 05/08/1990 | US4923489 Liquid level controller |
| 05/08/1990 | US4922953 Viscous liquid supply tanks |
| 05/02/1990 | EP0366340A2 Automotive oil level control valve apparatus |
| 05/02/1990 | CN2056768U Self controller for water level |
| 05/01/1990 | US4921165 Automotive oil level control valve apparatus |
| 05/01/1990 | US4921134 Circuit arrangement for regulating the filling and refilling of containers with liquids |
| 04/25/1990 | CN2056522U Automotive controller for liquid flow |
| 04/19/1990 | DE3835406A1 Vorrichtung zum messen eines fuellstandes Device for measuring a fill level |
| 04/18/1990 | CN2056258U Level control valve |
| 04/17/1990 | US4917135 Liquid level regulator device |
| 04/12/1990 | DE3834588A1 Liquid dispenser (apportioner) with self-controlling liquid level in the consumer bowl by means of air quantity exchange between two air chambers |
| 04/11/1990 | CN2055952U Automatic controller of liquid level of electrolyzer |
| 04/05/1990 | WO1990003255A1 Recoating of stereolithographic layers |
| 04/04/1990 | EP0361847A2 Recoating of stereolithographic layers |
| 04/04/1990 | CN2055612U Intelligence liquid level automatic controll instrument |
| 04/04/1990 | CN2055611U Auto-valve for liquid level locating |
| 03/28/1990 | CN2055265U Pressure type liquid level controller |
| 03/28/1990 | CN2055264U Oil tank liquid level pneumatic warner |
| 03/27/1990 | CA1267203A1 Ice bin level sensor |
| 03/20/1990 | US4909274 Valve apparatus |
| 03/14/1990 | CN2054544U 液位自控装置 Level-controlled device |
| 03/14/1990 | CN2054543U Automatic control water level alarm device |
| 03/07/1990 | CN2054174U Electronic liquid lever controller |
| 03/07/1990 | CN2054173U Submersible autocontrol switch for liquid level |
| 02/28/1990 | EP0355153A1 Liquid level control system. |
| 02/21/1990 | CN1039911A Float bowl hammer left-right circuit switch device |
| 02/14/1990 | CN2052911U Mult-function fully automatic controller for liquid level |
| 02/07/1990 | EP0353489A2 Automated chemical storage and chemical feed system |
| 02/07/1990 | CN2052552U Automatic control device for water-level of sewage circulating system |
| 02/07/1990 | CN2052551U Liquid-level electrode of ceramic tube |
| 01/23/1990 | US4895222 Constant level oiler |
| 01/18/1990 | DE3824076A1 Method for the regulation of the filling level |
| 01/02/1990 | US4890651 Ultrasonic automatic cup filling method operating adjacent valves on different A.C. half cycles |
| 12/26/1989 | US4889273 Soldering apparatus |
| 12/19/1989 | US4887411 Apparatus for filling bags or pouches with a perfusion liquid |
| 12/06/1989 | CN2048989U Buoyancy liquid level controtler |
| 11/30/1989 | DE3817444A1 Float-controlled regulating device for changing the flow cross-section of the outlet opening of a liquid container, especially a rain retention basin |
| 11/29/1989 | EP0343435A1 Float actuated control device for changing the flow section of an outlet opening of a compensation basin, specially of a retention basin for rainwater |
| 11/28/1989 | US4883100 Automatic control system for filling beverage containers |
| 11/22/1989 | CN2048207U Liquid level monitor of lighted liquid surface |
| 11/22/1989 | CN2048206U Vertical silo material locator |
| 11/21/1989 | US4881873 Capacitance level sensor for a bilge pump |
| 11/14/1989 | US4880027 Method of and apparatus for regulating the flow of at least one gas stream |
| 11/14/1989 | US4879902 Level control structure with probes |
| 11/02/1989 | EP0339187A2 Liquid level and pressure control device for separators |
| 10/31/1989 | US4877352 Method and apparatus for control of an upstream water level |
| 10/31/1989 | US4877066 Apparatus for filling transmission fluid into transmissions |
| 10/24/1989 | US4875497 Capacitance liquid level sensing and touch control system |