| Patents for G01S 15 - Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems (17,242) |
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| 10/09/1991 | EP0450667A2 Three dimensional imaging system |
| 10/09/1991 | EP0450431A2 Ultrasonic diagnostic system |
| 10/08/1991 | CA1290442C Velocity reference system |
| 10/06/1991 | WO1991015781A1 Acoustic search device |
| 10/06/1991 | CA2079595A1 Acoustic search device |
| 10/03/1991 | WO1991014953A1 Device for measuring speed of moving body |
| 10/03/1991 | WO1991014589A1 Ultrasonic doppler velocity sensing within a hydraulic actuator |
| 10/01/1991 | US5054003 Ultrasonic ground speedometer utilizing doppler effect |
| 10/01/1991 | US5053983 Filter system having an adaptive control for updating filter samples |
| 10/01/1991 | US5052394 Method and apparatus for ultrasonic beam compensation |
| 10/01/1991 | CA1290050C Arrangement for identifying the position of a movable body with ultrasound |
| 09/25/1991 | EP0448132A2 An implement for milking an animal |
| 09/25/1991 | CN1054876A Energy-saving automatic switch for lamp |
| 09/24/1991 | US5050611 Ultrasonic imaging apparatus |
| 09/24/1991 | US5050610 Transesophageal ultrasonic scanhead |
| 09/18/1991 | EP0447076A2 Improvements in acoustic ranging systems |
| 09/18/1991 | CN1054667A Reflecting sound microscope with acoustic mirror |
| 09/17/1991 | US5050133 Marine current determination |
| 09/17/1991 | US5048529 Ultrasonic transducer probe |
| 09/17/1991 | US5048528 Alias suppression in pulsed doppler systems |
| 09/11/1991 | EP0446111A1 Method and device for determining acoustically the position of a submarine object and application thereof to a trawl-net |
| 09/11/1991 | EP0288521A4 Check valve testing system |
| 09/10/1991 | US5047990 Underwater acoustic data acquisition system |
| 09/10/1991 | US5046500 Doppler flow velocity meter |
| 08/29/1991 | DE4005066A1 Dock-side container handling gantry - has control processor supervising automatic container handling |
| 08/29/1991 | DE3939328A1 Verfahren und vorrichtung zur abstandsmessung in gasen und fluessigkeiten mittels ultraschall Method and device for distance measurement in gases and liquids using ultrasound |
| 08/27/1991 | USRE33672 Method for measuring characteristics of living tissue by ultrasonic waves |
| 08/27/1991 | US5043954 Apparatus for preventing turning-in and transmitter for vehicle |
| 08/27/1991 | US5043952 Monopole transmitter for a sonic well tool |
| 08/27/1991 | US5042491 Ultrasonic diagnostic apparatus |
| 08/22/1991 | WO1991013369A1 Combined reflection and transmission ultrasonic imaging method and apparatus |
| 08/22/1991 | DE4005302A1 Ultrasonic Doppler motion detector circuit - has rectifier input coupled to junction of reception amplifier and phase detector |
| 08/22/1991 | CA2051653A1 Combined reflection and transmission ultrasonic imaging method and apparatus |
| 08/14/1991 | EP0441687A1 Method and apparatus for accurately measuring the distance to a surface |
| 08/14/1991 | EP0441531A2 Method and system for digital measurement of acoustic burst travel time in a fluid medium |
| 08/14/1991 | EP0441451A1 Echography device for measuring the velocity of moving organs and blood flow with high measurable speed limit |
| 08/14/1991 | EP0441044A2 Synthetic aperture minimum redundancy sonar apparatus |
| 08/14/1991 | EP0440796A1 Ultrasonic diagnostic apparatus |
| 08/14/1991 | DE4003775A1 Control system for ultrasonic range sensor - uses variation of selected transmission parameter to differentiate between different sensors |
| 08/13/1991 | US5038788 Ultrasonic Doppler diagnosis apparatus |
| 08/13/1991 | US5038611 Apparatus and method for providing a temperature compensated liquid level measurement |
| 08/08/1991 | WO1991011146A1 Ultrasonic method and apparatus for determination of vessel location and size |
| 08/07/1991 | EP0440313A2 Ultrasonic detector, methods for searching a moving object, ultrasonic sensor unit, element for positioning an animal, terminal apparatus for an automatic milking system, and method for automatically milking an animal |
| 08/06/1991 | US5036945 Sonic well tool transmitter receiver array including an attenuation and delay apparatus |
| 08/06/1991 | CA2035119A1 Method and apparatus for accurately measuring the distance to a surface |
| 08/01/1991 | DE4100867A1 Production of orthographic ultrasonic images, for medical diagnosis - using ultrasonic transmission and reception systems including reflex camera arrangement |
| 07/31/1991 | EP0439239A1 Ultrasonic detector, methods for searching a moving object, ultrasonic sensor unit, element for positioning an animal, terminal apparatus for an automatic milking system, and method for automatically milking an animal |
| 07/31/1991 | EP0438562A1 Sonar surveying system |
| 07/30/1991 | US5036477 Method for the interference suppression in ultrasonic distance measurements |
| 07/30/1991 | US5035540 Shallow water pipeline tracker system |
| 07/30/1991 | US5035290 Height sensing device including an ultrasonic sensor and a mechanical sensor |
| 07/30/1991 | US5035245 Ultrasonic Doppler blood flow velocity detection apparatus |
| 07/30/1991 | US5035147 Method and system for digital measurement of acoustic burst travel time in a fluid medium |
| 07/25/1991 | WO1991010920A1 Device and process for detecting the presence of a vehicle by means of an ultrasonic device |
| 07/25/1991 | WO1991010919A1 Range-finder system |
| 07/24/1991 | EP0437649A1 Method of ultrasound imaging |
| 07/23/1991 | WO1991010579A1 A parking-aid device |
| 07/23/1991 | US5034890 Automotive suspension control system with road-condition-dependent damping characteristics |
| 07/23/1991 | CA2074067A1 Parking-aid device |
| 07/16/1991 | US5033031 Underground ultrasonic tillage depth sensor |
| 07/16/1991 | US5033030 Turbulence velocimetry technique |
| 07/16/1991 | US5033029 Interlaced sonar system |
| 07/16/1991 | US5032793 NMR gated imaging apparatus |
| 07/16/1991 | US5031628 Ultrasonic blood velocity detector |
| 07/16/1991 | US5031626 Extracorporeal lithotripsy apparatus with an ultrasound locating system |
| 07/16/1991 | CA1286278C Automatic flow-control device |
| 07/09/1991 | US5031157 Color sonar for underwater object collision avoidance |
| 07/09/1991 | US5031154 Three-dimensional object imaging method and system |
| 07/09/1991 | US5030230 Corneal implant |
| 07/03/1991 | EP0435488A1 Apparatus and method for providing a temperature compensated liquid level measurement |
| 07/03/1991 | EP0434949A1 Room monitoring system |
| 07/02/1991 | US5029194 Method and apparatus for accurately measuring the distance to a surface |
| 07/02/1991 | US5029144 Synthetic aperture active underwater imaging system |
| 07/02/1991 | US5027820 Device for the three-dimensional focusing of an ultrasonic beam |
| 07/02/1991 | US5027658 Three dimensional imaging method and device using ellipsoidal backprojection with arbitrarily shaped pulses |
| 07/02/1991 | CA1285630C2 Proximity detection system for doors and the like |
| 07/02/1991 | CA1285629C2 Proximity detection system for doors and the like |
| 07/02/1991 | CA1285627C Proximity detection system for doors and the like |
| 06/26/1991 | EP0434229A2 Enhanced ocean bottom sonar system |
| 06/26/1991 | EP0433492A1 Ultrasonic device for the virtual reduction of the array partition of a connectable transducer array |
| 06/25/1991 | US5025789 Shock wave source having a central ultrasound locating system |
| 06/21/1991 | CA2006310A1 Method of monitoring acoustic contact in ultrasonic testing |
| 06/20/1991 | DE4038104A1 Ascertaining spectral width of Doppler signals - measuring ratio of auto-correlation functions at null and pulse period displacement positions |
| 06/18/1991 | US5025425 Sonic detection and tracking system |
| 06/18/1991 | US5025423 Enhanced bottom sonar system |
| 06/18/1991 | US5024093 Fan-shape scanning ultrasonic flaw detecting apparatus |
| 06/11/1991 | US5022400 Large time bandwidth echographic signal processor |
| 06/06/1991 | DE3939387A1 Ultrasonic distance warning system esp. for motor vehicles - has aperture covering membrane carrying piezo-plate to eliminate group echos |
| 06/05/1991 | EP0430450A2 2-D phased array ultrasound imaging system with distributed phasing |
| 06/05/1991 | EP0430374A1 Measurement display device for physiological parameters of blood flow using ultrasonic echography |
| 06/05/1991 | EP0430226A2 Method and device for detecting approaching objects |
| 06/05/1991 | EP0430148A2 Distance measurement method and apparatus, and relative position measurement apparatus |
| 06/05/1991 | EP0430094A1 Method and apparatus for imaging blood flow in a living body |
| 06/05/1991 | EP0430093A2 Ultrasonic doppler imaging with analog feedback signal canceller |
| 06/05/1991 | EP0429990A2 A loading dock range finding system |
| 06/05/1991 | EP0429799A1 Ultrasound imaging method and apparatus |
| 06/05/1991 | EP0429687A1 Improvements relating to installations for measuring liquid depth |
| 06/04/1991 | US5022015 Sonar system of the type using hollow conical beams |
| 06/04/1991 | US5020477 Automatic milking device and method of operation thereof |
| 06/04/1991 | US5020374 Acoustic emission |