| Patents for G01F 23 - Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm (31,056) |
|---|
| 08/19/1980 | US4218734 Process quantity display apparatus |
| 08/19/1980 | US4217779 Liquid level sensing means |
| 08/19/1980 | US4217778 Liquid level gauge illuminating system |
| 08/19/1980 | CA1084117A1 Rf admittance measuring method and apparatus for determining the level of a conductive liquid |
| 08/19/1980 | CA1083848A1 Sensitive j-tube and applications thereof |
| 08/12/1980 | US4217644 Apparatus for indicating the distance over which a vehicle can travel with the residual fuel |
| 08/07/1980 | WO1980001607A1 Liquid metal level inductive indicator |
| 08/06/1980 | EP0014074A1 Brake pad wear detection system |
| 08/05/1980 | US4216468 Flood warning device |
| 08/05/1980 | US4216376 Neutron interface detector |
| 08/05/1980 | US4215574 Indication of the momentary value of liquid level |
| 07/29/1980 | US4214479 Capacitive type fuel probe compensation circuit |
| 07/29/1980 | US4214368 Dipstick for liquid nitrogen |
| 07/23/1980 | EP0013466A1 Temperature monitoring device |
| 07/22/1980 | US4213340 Oil-water interfacial detector |
| 07/22/1980 | US4213339 Reservoir sensor |
| 07/22/1980 | US4213338 Liquid level indicator |
| 07/22/1980 | US4213337 Liquid level sensing devices |
| 07/22/1980 | US4213258 Steam iron water gauge |
| 07/22/1980 | CA1082053A1 Optical material level probe |
| 07/15/1980 | US4212342 Method and apparatus for regulating the bath level of a continuous casting mold |
| 07/15/1980 | US4212202 Distributed compensation for capacitance-type fluid measuring apparatus |
| 07/15/1980 | CA1081866A1 Level and interface detection |
| 07/08/1980 | US4211249 Liquid level control system |
| 07/08/1980 | US4211112 Gaskets for liquid level gages |
| 07/08/1980 | CA1081344A1 Liquid level detecting apparatus |
| 07/08/1980 | CA1081343A1 Float detecting device for pressurized slurry transfer apparatus |
| 07/08/1980 | CA1081001A2 Liquid measuring and collection device |
| 07/08/1980 | CA1080994A1 Flow proportioner |
| 07/01/1980 | US4210969 Sonic ranging systems to eliminate errors due to variations in the sound velocity in the medium |
| 07/01/1980 | US4210809 Method and apparatus for the non-invasive determination of the characteristics of a segmented fluid stream |
| 07/01/1980 | US4210029 Differential fiber optic differential pressure sensor |
| 07/01/1980 | US4210023 Method and apparatus for measuring slag foaming using microwave lever meter |
| 06/26/1980 | WO1980001319A1 Combined dipstick breather tube |
| 06/25/1980 | EP0012311A1 Apparatus for mounting a radar probe in shaft furnaces |
| 06/24/1980 | US4209740 Detector for locating the interfacial boundary level between two liquids |
| 06/24/1980 | US4208909 Admittance sensing probe having multiple sensing elements |
| 06/17/1980 | US4207766 Attitude compensating liquid content indicator |
| 06/17/1980 | US4207645 Engine accessory |
| 06/17/1980 | CA1079832A1 Liquid-level float switch construction |
| 06/17/1980 | CA1079544A2 Liquid measuring and collection device |
| 06/17/1980 | CA1079520A1 Dipstick with pressure relief valve |
| 06/11/1980 | EP0011614A1 Apparatus for metering or distributing the volume of liquids |
| 06/10/1980 | US4207030 Apparatus for controlling liquid level in a reservoir |
| 05/27/1980 | US4205315 Fluid level measurement apparatus for mounting in manholes and similar structures |
| 05/27/1980 | US4205237 Liquid level sensor, pump system means and circuit means |
| 05/27/1980 | US4204427 Device for the capacitive level height measurement of liquids or solids |
| 05/20/1980 | US4204203 Level indicator |
| 05/20/1980 | US4203462 Water level control system |
| 05/20/1980 | US4203325 Liquid level sensing apparatus |
| 05/20/1980 | US4203324 Sonic liquid level detector |
| 05/13/1980 | US4203090 Transponder system including an oscillator ripple counter controlling a coded analog multiplex network in a circuit with a driver/gate circuit for generating red-alert end condition digital signals in a storage tank gauging system |
| 05/13/1980 | US4202367 Circuit arrangement for regulating the level of liquid in vessels |
| 05/13/1980 | US4202267 Device for monitoring the ink supply in ink-operated printers |
| 05/06/1980 | US4202049 Ultrasonic-filling position limit switch operating according to the echo principle |
| 05/06/1980 | US4201914 Electrical instrument to detect the presence of liquid and method of operating the same |
| 05/06/1980 | US4201240 Electronic liquid level monitor and controller |
| 05/06/1980 | US4201086 Viewing rod for determining the level of liquid within a receptacle |
| 05/06/1980 | US4201085 Apparatus for determining the liquid level in a tank |
| 05/06/1980 | US4200982 Apparatus for automatically sensing and recording data in a sewage system |
| 05/06/1980 | CA1077165A1 Vibratory bin level indicators |
| 04/30/1980 | EP0010539A1 Method to measure the filling level of liquid metals in containers, especially in continuous-casting moulds |
| 04/29/1980 | US4200876 Water level recorder |
| 04/29/1980 | US4199984 Capacitive measuring apparatus |
| 04/29/1980 | US4199983 Apparatus for detecting the level of liquid in a tank |
| 04/22/1980 | US4199544 Read-off device for medical samples |
| 04/22/1980 | US4198848 Level gauge calibration apparatus |
| 04/22/1980 | US4198824 Sealed fluid reservoir for brake master cylinders |
| 04/22/1980 | CA1075931A1 Infra-red profilometer |
| 04/22/1980 | CA1075929A2 Liquid level sensor |
| 04/16/1980 | EP0009790A1 Device for indicating the drop below a predetermined filling level of a dosing material contained in a reservoir |
| 04/15/1980 | US4198626 Intravenous alarm device |
| 04/15/1980 | CA1075474A1 Separation of cobalt and nickel |
| 04/08/1980 | US4197459 Totally reflecting infrared radiation with low transmitting energy for use near explosives |
| 04/08/1980 | US4197458 Electro-optical apparatus for the detection of the presence of liquid |
| 04/08/1980 | US4196625 Device for monitoring the ink supply in ink recording devices |
| 04/08/1980 | US4196624 Probe assembly |
| 04/08/1980 | CA1074992A1 Dip stick |
| 04/02/1980 | EP0009252A1 Level gauging device for a container filled at least partially with a liquid |
| 04/01/1980 | US4196384 Probe assembly for monitoring liquids |
| 04/01/1980 | US4195428 Steam iron water gauge |
| 03/25/1980 | US4194397 Apparatus for indicating the level of a fluid |
| 03/25/1980 | US4194396 Automobile fuel gauge system |
| 03/25/1980 | US4194395 Capacitive liquid level sensor |
| 03/18/1980 | US4194195 Portable liquid level maintenance monitor system for vehicles |
| 03/18/1980 | US4194177 Transducer system for continuous monitoring liquid levels in storage tanks and the like |
| 03/18/1980 | US4194077 Batch sensor for glass-melting furnaces |
| 03/18/1980 | US4193303 Level and density-meter |
| 03/18/1980 | US4193291 Slow torsional wave densitometer |
| 03/18/1980 | CA1073874A1 Can filling apparatus and methods and apparatus and methods for conveying and controlling the feeding of wet materials |
| 03/11/1980 | US4193010 Sensor device using piezoelectric coating subjected to bending |
| 03/11/1980 | US4193004 Fluid level monitoring through fluid cell protrusion |
| 03/11/1980 | US4192345 Sealed type hydraulic reservoir |
| 03/11/1980 | US4192187 Float controlled volumetric gauge |
| 03/11/1980 | US4192186 Fluid level and visual inspection device |
| 03/11/1980 | CA1073241A1 Liquid level indicator |
| 03/06/1980 | WO1980000382A1 Method and device for controlling a liquid level |
| 03/05/1980 | EP0008508A1 Liquid level sensing apparatus |
| 03/04/1980 | US4191951 Device for sensing fluid forces |
| 03/04/1980 | US4191050 Liquid level indicating floats |