| 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) |
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| 02/14/1978 | US4074025 Indicating device for storage battery |
| 02/14/1978 | US4073310 Method and apparatus for controlling the liquid level above a solid bed |
| 02/07/1978 | US4072053 Apparatus for indicating liquid level in a receptacle |
| 02/07/1978 | US4072052 Flow proportioner |
| 02/07/1978 | US4072044 Liquid level controller and soil test instrument |
| 01/31/1978 | US4071818 Magnetostrictive position indicator |
| 01/31/1978 | US4071168 Level control system for a rotary cone-type feed hopper |
| 01/24/1978 | US4070625 Apparatus for measuring the distance to the floor of the cargo hold of a ship through intervening bulk material |
| 01/24/1978 | US4069838 Fiber optic liquid level sensor |
| 01/24/1978 | US4069710 Apparatus for the capacitative measurement of the surface level of fluid media in vessels |
| 01/17/1978 | US4069405 Swimming pool alarm system |
| 01/10/1978 | US4068222 Circuit arrangement for automatic level control for optical sensors with pulsed radiation, for example for surveillance equipment |
| 01/10/1978 | US4067113 Dipstick with pressure relief valve |
| 01/03/1978 | US4066997 Fluid level indicator for tandem master cylinder |
| 01/03/1978 | US4066858 Vertical float switch |
| 01/03/1978 | US4065968 Liquid level measuring apparatus |
| 01/03/1978 | US4065967 Silo level indicating system |
| 12/27/1977 | US4065760 Liquid level sensor |
| 12/27/1977 | US4065226 Water well monitor |
| 12/27/1977 | US4064755 Liquid level sensor |
| 12/27/1977 | US4064754 Method for measuring the filling level in containers and apparatus for performing the method |
| 12/27/1977 | US4064753 RF admittance measuring method and apparatus for determining the level of a conductive liquid |
| 12/27/1977 | US4064752 Remote multiple tank liquid level measuring device |
| 12/20/1977 | US4063457 Ultrasonic level sensing device |
| 12/06/1977 | US4061901 Telemetering system |
| 12/06/1977 | US4061893 Sprinkler flow control systems having continuous cycle timer and associated apparatus disposed in a hermetically sealed housing |
| 12/06/1977 | US4061016 Method and apparatus for measuring the foam life on an effervescent beverage |
| 11/29/1977 | US4059995 Level indicators for liquids |
| 11/22/1977 | US4059016 Froth level monitor |
| 11/15/1977 | US4058765 General displacement sensor |
| 11/15/1977 | US4058694 Master cylinder reservoir with vacuum relief diaphragm and guarded fluid level sensor |
| 11/08/1977 | US4057700 Fluid level indicator |
| 11/08/1977 | US4056979 Liquid level sensor |
| 11/08/1977 | US4056978 Probe for measuring liquid levels |
| 11/08/1977 | US4056887 Device for the measurement of liquid level |
| 11/01/1977 | US4055991 Liquid gauge assembly |
| 11/01/1977 | US4055957 Automotive brake fluid low-level warning sensor |
| 11/01/1977 | US4055898 Means for facilitating checking and replenishment of crankcase oil in a small engine |
| 10/11/1977 | USRE29435 Method of supervising the filling level in hoppers, shafts, silos and the like for miscellaneous materials and means for performing the method |
| 10/11/1977 | US4053874 Apparatus for monitoring the liquid level in a tank |
| 10/11/1977 | US4053002 Liquid dispenser with liquid level indicator |
| 10/11/1977 | US4052901 Level detecting |
| 10/11/1977 | US4052900 Transducers |
| 10/04/1977 | US4052686 Flexible position probe assembly |
| 10/04/1977 | US4052612 Analog-to-digital encoder unit employing a pre-encoded film with improved film tensioning means |
| 10/04/1977 | US4051727 Liquid mixture indicator for rug shampoo apparatus |
| 10/04/1977 | US4051726 Electro-optical liquid level indicator |
| 09/27/1977 | US4050314 Pressure gauge |
| 09/27/1977 | US4050305 Shield and bracket assembly for flowmeter |
| 09/27/1977 | US4050107 Tool for truck operators |
| 09/20/1977 | US4048856 Quick shut-off direct reading liquid level indicator |
| 09/20/1977 | US4048855 Liquid level gauge particularly for motorcycle |
| 09/13/1977 | US4047434 Bin depth monitor |
| 09/06/1977 | US4046977 Fluid reservoir |
| 09/06/1977 | US4045876 Liquid level indicator and flow measuring device |
| 08/30/1977 | US4045308 Aluminum halide reduction |
| 08/23/1977 | US4044355 Measurement of contents of tanks etc. with microwave radiations |
| 08/23/1977 | US4044354 Distance measurement using microwaves |
| 08/23/1977 | US4043800 Oxygen gas |
| 08/23/1977 | US4043199 Level indicator for granulate storage tanks |
| 08/23/1977 | US4043193 Method and apparatus for measuring volume and density of fluids in a drilling fluid system |
| 08/02/1977 | US4039845 Optical-electrical liquid probes |
| 08/02/1977 | US4038871 Liquid level gauge |
| 07/26/1977 | US4038650 Fluid level detector and probe assembly |
| 07/26/1977 | US4038548 Level and interface detection |
| 07/26/1977 | US4038004 Measurement apparatus for determining the degree of filling of a casting mold |
| 07/26/1977 | US4037761 Indication of levels in receptacles |
| 07/26/1977 | US4037471 Oil level detection device in engine oil pan |
| 07/19/1977 | US4037193 Liquid level alarm apparatus for a tank of a vehicle |
| 07/19/1977 | US4036060 Temperature measuring process and probe |
| 07/19/1977 | US4036055 Liquid level measuring apparatus |
| 07/19/1977 | US4036053 Methods of and means for measuring liquid flow |
| 07/12/1977 | US4035789 Liquid level sensing system |
| 07/12/1977 | US4034608 Automotive oil gauge |
| 07/05/1977 | US4034336 Electronic monitor system for automobiles |
| 07/05/1977 | US4034237 Drive circuit for ultrasonic level gauge |
| 07/05/1977 | US4033190 Precision measuring device |
| 06/21/1977 | US4031503 Anti-corrosion ultrasonic transducer |
| 06/14/1977 | US4028940 Level sensor |
| 06/07/1977 | US4027534 Electrode device for monitoring liquid levels |
| 05/31/1977 | US4027233 Contactless inductance pickup for detecting the interface of two media |
| 05/31/1977 | US4027172 Resistive fluid detecting means |
| 05/31/1977 | US4026239 Grease level indicator |
| 05/31/1977 | US4026151 Measuring device for water flow in a buried pipe |
| 05/24/1977 | US4025846 Capacitive sensor |
| 05/24/1977 | US4025798 Fail-safe circuit |
| 05/24/1977 | US4024989 Dispensing attachment for indicating amount of fluid content removed from a container therefor |
| 05/24/1977 | US4024887 Automatic valving system |
| 05/24/1977 | US4024644 Gauge for measuring the headspace in a container |
| 05/17/1977 | US4023231 Oil dip stick wiper |
| 05/10/1977 | US4023137 Device for indicating the oil level in a combustion engine crankcase |
| 05/10/1977 | US4022062 Gauge glass shield |
| 05/10/1977 | US4021943 Pressing iron water level gauge |
| 05/10/1977 | US4021924 Dip stick |
| 05/03/1977 | US4021707 Compensated probe for capacitive level measurement |
| 05/03/1977 | US4020691 D.C. signal currents in capacitance gaging systems |
| 05/03/1977 | US4020690 Cryogenic liquid level measuring apparatus and probe therefor |
| 04/26/1977 | US4020488 Or control apparatus |
| 04/26/1977 | US4020481 Fluid level alarm device |
| 04/26/1977 | US4019659 Solids level indicator |