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Class Information
Number: 181/124
Name: Acoustics > Echo system > Altitude or depth detection
Description: Subject matter for determining the vertical distance of a body above the surface of the earth or the vertical distance down from a surface.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7213456 |
Device for measuring the level of a fluid in a fuel tank of a motor vehicle |
May. 8, 2007 |
| 6982929 |
Height measurement method and apparatus |
Jan. 3, 2006 |
| 6934657 |
Method, system, and device for graphically presenting water temperature data |
Aug. 23, 2005 |
| 6595315 |
Underwater detecting apparatus, depth measuring apparatus and display apparatus |
Jul. 22, 2003 |
| 6588269 |
Piezoelectric device for measuring liquid level |
Jul. 8, 2003 |
| 6505509 |
Apparatus and method for measuring the level of a fluid |
Jan. 14, 2003 |
| 6427532 |
Device for measuring a fill level of a liquid in a container |
Aug. 6, 2002 |
| 6360599 |
Device for measuring liquid level preferably measuring tide level in sea |
Mar. 26, 2002 |
| 6345683 |
System and method for an improved device for measuring water levels |
Feb. 12, 2002 |
| 5778726 |
Device for monitoring a predetermined level of a liquid in a container |
Jul. 14, 1998 |
| 5507178 |
Liquid presence and identification sensor |
Apr. 16, 1996 |
| 5363341 |
Level measuring device which can be assembled from components |
Nov. 8, 1994 |
| 5357801 |
Liquid-level gauging |
Oct. 25, 1994 |
| 5319974 |
Ultrasonic level measuring system |
Jun. 14, 1994 |
| 5319973 |
Ultrasonic fuel level sensing device |
Jun. 14, 1994 |
| 5309763 |
Liquid-level gauging |
May. 10, 1994 |
| 5263371 |
Methods for temperature-compensated liquid height and leak detection measurements using quasi-static reference subsystem |
Nov. 23, 1993 |
| 5226320 |
Measuring device and process for determining the fill level in fluid containers, preferably for tank installations, with a sound waveguide |
Jul. 13, 1993 |
| 5131271 |
Ultrasonic level detector |
Jul. 21, 1992 |
| 5127266 |
Methods for liquid measurement using quasi-static reference subsystem |
Jul. 7, 1992 |
| 5119676 |
Ultrasonic method and apparatus for determining water level in a closed vessel |
Jun. 9, 1992 |
| 5121340 |
Multi-level probe and system for measurement of physical conditions in liquid-containing tanks |
Jun. 9, 1992 |
| 5088068 |
Hand-held underwater distance measurement device |
Feb. 11, 1992 |
| 5076101 |
Liquid level measurement system for tanks |
Dec. 31, 1991 |
| 5036703 |
Method and apparatus for testing liquid fillings in tanks |
Aug. 6, 1991 |
| 5033031 |
Underground ultrasonic tillage depth sensor |
Jul. 16, 1991 |
| 4918671 |
Depth sounder operation for hostile environments |
Apr. 17, 1990 |
| 4916674 |
Method and apparatus for improving the shallow water performance of a depth sounder |
Apr. 10, 1990 |
| 4873676 |
Sonar depth sounder apparatus |
Oct. 10, 1989 |
| 4837750 |
Apparatus for displaying depth sounding data with nautical range |
Jun. 6, 1989 |
| 4829492 |
Depthfinder with color LCD display |
May. 9, 1989 |
| 4829493 |
Sonar fish and bottom finder and display |
May. 9, 1989 |
| 4780861 |
Automatic control system for filling beverage containers |
Oct. 25, 1988 |
| 4775028 |
Method and system for depth sounding |
Oct. 4, 1988 |
| 4765186 |
Liquid level detector by guided elastic waves |
Aug. 23, 1988 |
| 4637463 |
Echo ranging gun |
Jan. 20, 1987 |
| 4408676 |
Gas gun assembly |
Oct. 11, 1983 |
| 4153357 |
Underwater camera |
May. 8, 1979 |
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