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Class Information
Number: 367/112
Name: Communications, electrical: acoustic wave systems and devices > Echo systems > Distance or direction finding > With indicator > Alarm
Description: Subject matter which includes an alerting device (e.g., minimum depth alarm).










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
7940602 Real-time system and method of underwater depth discrepancy detection, recordation and alarm notification May. 10, 2011
7602671 Oil heating tank meter for monitoring a plurality of variables Oct. 13, 2009
7324021 Input device Jan. 29, 2008
7209031 Obstacle detecting apparatus and method Apr. 24, 2007
7006406 Underwater detecting apparatus, depth measuring apparatus and display apparatus Feb. 28, 2006
6317385 Aquaculture feeding monitor Nov. 13, 2001
6141302 Optical recording/reproducing apparatus including a mask device for masking marginal rays, in a direction perpendicular to a recording medium track, of a light beam returned from the recording Oct. 31, 2000
5627510 Vehicular safety distance alarm system May. 6, 1997
5594413 Car collision prevention apparatus and method using dual processor and automatic sensor switching function Jan. 14, 1997
5574426 Obstacle detection system for vehicles moving in reverse Nov. 12, 1996
5274607 Pool monitor Dec. 28, 1993
4873676 Sonar depth sounder apparatus Oct. 10, 1989
4731762 Distance sensing apparatus Mar. 15, 1988
4677595 Ultrasonic vehicle rangefinder Jun. 30, 1987
4648081 Circuit for automatic seabed discrimination Mar. 3, 1987
4644512 Sonar depth finder with relative depth LCD display Feb. 17, 1987
4597069 Depthsounder/fish finder Jun. 24, 1986
4580250 Ultrasonic detection and communication system for automobiles Apr. 1, 1986
4561064 Non-contacting distance measuring system Dec. 24, 1985
4551722 Apparatus and method for detecting obstacles in the path of a moving vehicle Nov. 5, 1985
4549181 Moving obstacle detection system for a vehicle Oct. 22, 1985
4543577 Moving obstacle detection system for a vehicle Sep. 24, 1985
4528563 Rearward obstruction sensing system for automotive vehicle Jul. 9, 1985
4479207 Load detecting system for automatic storage apparatus Oct. 23, 1984
4464738 Sonar distance sensing apparatus Aug. 7, 1984
4459689 Multiple zone object detection system Jul. 10, 1984
4442512 Ultrasonic wave transmitting and receiving device for vehicles Apr. 10, 1984
4409827 Combined marine instrument and display therefor Oct. 18, 1983
4399431 Alarm or warning device for signaling left-behind master or original Aug. 16, 1983
4345657 Electronic depth indicator for hydraulic drilling machines Aug. 24, 1982
4326273 Ultrasonic ranging device Apr. 20, 1982
4323992 Depth sounder repeater structure and method Apr. 6, 1982
4313181 Torpedo countermeasure Jan. 26, 1982
4278962 Automatic alarm system for detecting obstacles behind a backing vehicle Jul. 14, 1981
4260980 Blind spot detector for vehicles Apr. 7, 1981
4240152 Object indicator for moving vehicles Dec. 16, 1980
4229811 Intrusion detection method and apparatus Oct. 21, 1980
4228530 Mud level monitor Oct. 14, 1980
4225952 Marine depth sounding apparatus Sep. 30, 1980
4225949 Method of and apparatus for navigating unmarked channels Sep. 30, 1980
4221004 Adjustable ultrasonic level measurement device Sep. 2, 1980
4197528 Movement-detecting processing circuit for an ultrasonic detection system Apr. 8, 1980
4195359 Automatic echo detection and classification system Mar. 25, 1980
4186371 Echo sounders Jan. 29, 1980
4184142 Pulse generating circuit means for depth sounder alarm and transmitter Jan. 15, 1980
4097836 Depth sound indicator Jun. 27, 1978
4081784 Omnidirectional monitor buoy Mar. 28, 1978
4057779 Ultrasonic detection system Nov. 8, 1977
4056802 Sonar alarm system Nov. 1, 1977
4028662 Passing vehicle signalling apparatus Jun. 7, 1977

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