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Class Information
Number: 73/313
Name: Measuring and testing > Liquid level or depth gauge > Float > With electrically controlled indicator
Description: Gauges having an indicator which is operated by the float through the medium of electrical means.










Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
6748805 Multiple input level sensor Jun. 15, 2004
6732584 Fuel level sensor with flexible circuit May. 11, 2004
6715350 Automatic tank gauge systems Apr. 6, 2004
6711949 Remote fluid level detection system Mar. 30, 2004
6708562 Level gauge for oil-filled transformers, chokes and tap changers Mar. 23, 2004
6701784 Carburetor fuel level management system Mar. 9, 2004
6688329 Water feeder controller for boiler Feb. 10, 2004
6681627 Level sensing safety device functionable in fall-over position Jan. 27, 2004
6679286 Ball tap with a water level switch Jan. 20, 2004
6595051 Fluid level sensing and control system Jul. 22, 2003
6595239 Feed device intended for mounting in a fuel tank Jul. 22, 2003
6591676 Device for detecting the level of liquid, particularly for submersed pumps Jul. 15, 2003
6588272 Redundant level measuring system Jul. 8, 2003
6588270 Filling level indicator for a washer fluid container Jul. 8, 2003
6571627 Slide detector Jun. 3, 2003
6564631 Digital signal fuel sensor May. 20, 2003
6563306 Method and apparatus for detecting displacement of a magnet moved in response to variation of a physical characteristic of a fluid May. 13, 2003
6561022 Position encoder May. 13, 2003
6557412 Non-fouling liquid level control May. 6, 2003
6536277 Level-tracing water-monitoring apparatus Mar. 25, 2003
6532814 Apparatus and method for detecting a leak in a swimming pool Mar. 18, 2003
6532813 Method and device for determining a fill level of liquid in a container Mar. 18, 2003
6523405 Portable bin full indicator Feb. 25, 2003
6513378 Liquid level float switch with manual reset Feb. 4, 2003
6508120 Fluid level monitor with at least partially submersible buoyant element Jan. 21, 2003
6508119 Liquid level measurement and fuel transducer using anisotropic magnetoresistance device Jan. 21, 2003
6497145 Float gauge with fixed liquid level gauge Dec. 24, 2002
6490922 System for controlling the level of the liquid contained in a LPG tank or the like Dec. 10, 2002
6490921 Oscillating liquid level measuring apparatus Dec. 10, 2002
6481276 Device for measuring the filling level of a filling material in a container Nov. 19, 2002
6481278 Hall-effect fine resolution liquid level indicator Nov. 19, 2002
6474158 Apparatus for measuring displacement and method of use thereof Nov. 5, 2002
6453741 Fuel transmitter for non-electrically invasive liquid level measurement Sep. 24, 2002
6443005 Pressure activated control Sep. 3, 2002
6427533 Vehicle liquid level gauge Aug. 6, 2002
6430380 Wet type image forming apparatus and information processing system using this apparatus Aug. 6, 2002
6425288 Lever transmitter for determining a filling level of liquid in a tank Jul. 30, 2002
6418984 Feed device intended for mounting in a fuel tank Jul. 16, 2002
6408692 Liquid level sensor Jun. 25, 2002
6401533 Level indicator Jun. 11, 2002
6397674 Method and apparatus for sensing the level of fluid within a container Jun. 4, 2002
6389892 Liquid level detection device and method of manufacturing conductor electrode used therefor May. 21, 2002
6380734 Control element assembly position verification apparatus Apr. 30, 2002
6370952 Vehicle oil level monitoring system Apr. 16, 2002
6367325 Motor vehicle fuel level sensor Apr. 9, 2002
6363785 Relative location detection sensor Apr. 2, 2002
6336362 Method and system for measuring and remotely reporting the liquid level of tanks and the usage thereof Jan. 8, 2002
6305220 Fuel gauging system for a motor vehicle fuel tank Oct. 23, 2001
6289731 Liquid level detector Sep. 18, 2001
6289728 Apparatus and method for determining the amount of liquid contained in a storage tank Sep. 18, 2001

1 2 3 4 5 6 7 8 9










 
 
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