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Class Information
Number: 367/114
Name: Communications, electrical: acoustic wave systems and devices > Echo systems > Distance or direction finding > With indicator > Meter
Description: Subject matter in which the display device is a meter of the moving coil type having a coil which pivots between permanent magnets, e.g., a volt meter or ammeter.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4420727 |
Self oscillating acoustic displacement detector |
Dec. 13, 1983 |
| 4323992 |
Depth sounder repeater structure and method |
Apr. 6, 1982 |
| 4285053 |
Acoustic method and apparatus for measuring micron and submicron distances |
Aug. 18, 1981 |
| 4221004 |
Adjustable ultrasonic level measurement device |
Sep. 2, 1980 |
| 4210970 |
Echo sounders |
Jul. 1, 1980 |
| 4175441 |
Gauge for measuring distance to planar surfaces and thicknesses of planar members |
Nov. 27, 1979 |
| 4068207 |
Acoustic log |
Jan. 10, 1978 |
| 3991398 |
Acoustic log |
Nov. 9, 1976 |
| 3976969 |
Underwater sound wave direction finding system |
Aug. 24, 1976 |
| 3934219 |
Acoustic method and apparatus for determining effectiveness of mine passage seal |
Jan. 20, 1976 |
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