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Your search returned 51 patents.
( 367/112 in Current US Classification ) |
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| 1 |
| Patent ID | Title | Date Filed |
| 7209031 | Obstacle detecting apparatus and method
| March 21, 2006 |
| 7006406 | Underwater detecting apparatus, depth measuring apparatus and display apparatus
| July 7, 2003 |
| 6317385 | Aquaculture feeding monitor
| August 7, 1999 |
| 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 medium
| October 21, 1997 |
| 5627510 | Vehicular safety distance alarm system
| September 12, 1994 |
| 5594413 | Car collision prevention apparatus and method using dual processor and automatic sensor switching function
| December 7, 1994 |
| 5574426 | Obstacle detection system for vehicles moving in reverse
| June 30, 1995 |
| 5274607 | Pool monitor
| October 20, 1992 |
| 4873676 | Sonar depth sounder apparatus
| July 28, 1987 |
| 4731762 | Distance sensing apparatus
| July 12, 1985 |
| 4677595 | Ultrasonic vehicle rangefinder
| October 3, 1984 |
| 4648081 | Circuit for automatic seabed discrimination
| January 19, 1984 |
| 4644512 | Sonar depth finder with relative depth LCD display
| February 16, 1984 |
| 4597069 | Depthsounder/fish finder
| October 17, 1983 |
| 4580250 | Ultrasonic detection and communication system for automobiles
| July 26, 1983 |
| 4561064 | Non-contacting distance measuring system
| February 28, 1983 |
| 4551722 | Apparatus and method for detecting obstacles in the path of a moving vehicle
| March 15, 1983 |
| 4549181 | Moving obstacle detection system for a vehicle
| September 29, 1982 |
| 4543577 | Moving obstacle detection system for a vehicle
| June 15, 1982 |
| 4528563 | Rearward obstruction sensing system for automotive vehicle
| October 24, 1983 |
| 4479207 | Load detecting system for automatic storage apparatus
| March 19, 1982 |
| 4464738 | Sonar distance sensing apparatus
| October 20, 1981 |
| 4459689 | Multiple zone object detection system
| December 28, 1981 |
| 4442512 | Ultrasonic wave transmitting and receiving device for vehicles
| April 17, 1981 |
| 4409827 | Combined marine instrument and display therefor
| January 26, 1982 |
| 4399431 | Alarm or warning device for signaling left-behind master or original
| October 7, 1981 |
| 4345657 | Electronic depth indicator for hydraulic drilling machines
| October 4, 1979 |
| 4326273 | Ultrasonic ranging device
| July 23, 1980 |
| 4323992 | Depth sounder repeater structure and method
| November 1, 1979 |
| 4313181 | Torpedo countermeasure
| August 29, 1962 |
| 4278962 | Automatic alarm system for detecting obstacles behind a backing vehicle
| November 14, 1978 |
| 4260980 | Blind spot detector for vehicles
| April 30, 1979 |
| 4240152 | Object indicator for moving vehicles
| June 15, 1978 |
| 4229811 | Intrusion detection method and apparatus
| November 9, 1978 |
| 4228530 | Mud level monitor
| May 19, 1978 |
| 4225952 | Marine depth sounding apparatus
| January 18, 1979 |
| 4225949 | Method of and apparatus for navigating unmarked channels
| October 17, 1978 |
| 4221004 | Adjustable ultrasonic level measurement device
| August 3, 1978 |
| 4197528 | Movement-detecting processing circuit for an ultrasonic detection system
| April 17, 1978 |
| 4195359 | Automatic echo detection and classification system
| June 28, 1954 |
| 4186371 | Echo sounders
| December 15, 1977 |
| 4184142 | Pulse generating circuit means for depth sounder alarm and transmitter
| December 29, 1977 |
| 4097836 | Depth sound indicator
| February 10, 1977 |
| 4081784 | Omnidirectional monitor buoy
| October 1, 1976 |
| 4057779 | Ultrasonic detection system
| February 2, 1976 |
| 4056802 | Sonar alarm system
| March 10, 1976 |
| 4028662 | Passing vehicle signalling apparatus
| May 24, 1976 |
| 3946376 | Multiple zone intrusion alarm system
| June 11, 1974 |
| 3938118 | Multizone intrusion alarm system
| June 12, 1974 |
| 3922631 | Underwater intrusion detecting system
| June 20, 1960 |
| 3922629 | Object detection system having fault detection function
| March 20, 1974 |
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