| Patents for G10K 11 - Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general (21,150) |
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| 02/21/1991 | WO1991002247A1 Ultrasonic inspection apparatus |
| 02/21/1991 | WO1991001902A1 Light bulb shaped audio signal emitter |
| 02/21/1991 | WO1991001814A1 Manufacture of electromechanical resonators which are electrically excited and piloted by the magnetostrictive effect |
| 02/21/1991 | WO1991001034A3 An acoustic liner |
| 02/20/1991 | EP0413028A1 Acoustic coupler. |
| 02/19/1991 | US4995012 Method of generating an elastic wave |
| 02/19/1991 | US4994798 Multiplexed surface acoustical wave apparatus |
| 02/19/1991 | US4993416 For tissue |
| 02/19/1991 | CA1280504C Deployable cylindrical sonar |
| 02/19/1991 | CA1280503C Sonar dome |
| 02/16/1991 | WO1991002989A1 Sonar surveying system |
| 02/16/1991 | CA2039157A1 Sonar surveying system |
| 02/14/1991 | DE3925322A1 Breaking up internal concretions in patient - involves acoustic wave focussing device with wave generator and locating unit |
| 02/13/1991 | EP0412902A2 Electroacoustic device for hearing needs including noise cancellation |
| 02/13/1991 | EP0412816A2 Integrally-damped metal/composite laminates and method of attaching same |
| 02/13/1991 | EP0412396A2 Method and device for testing a tube |
| 02/13/1991 | EP0412315A2 Sound attenuator |
| 02/12/1991 | US4992999 Submarine drone for carrying a barrel stave-type transducer array |
| 02/12/1991 | US4991441 Positioning assembly for a transducer in a boresonic inspection system |
| 02/12/1991 | US4991439 Apparatus for detecting insect-induced vibrations in particulate matter |
| 02/11/1991 | CA2022888A1 Electroacoustic device for hearing needs including noise cancellation |
| 02/07/1991 | DE3925354A1 Acoustically insulating sheets - consist preferably of particles of scrap thermoplastics which are welded together at their points of contact and leave voids between them |
| 02/06/1991 | EP0411801A2 Communication system with active noise cancellation |
| 02/06/1991 | EP0411671A2 Acoustic apparatus |
| 02/06/1991 | EP0411198A1 Absorber for electromagnetic and acoustic waves |
| 02/05/1991 | US4991147 Half-beam digital target |
| 02/05/1991 | US4990391 Reticulated core to perforate sheet bonding and galvanic barrier |
| 02/05/1991 | US4989530 Low drag homing torpedo nose assembly having side mounted planar arrays |
| 02/05/1991 | US4989454 Scanning apparatus for a scanning microscope |
| 01/31/1991 | DE4022238A1 Composite steel and plastics panel - are for motor vehicle bodywork and have all-steel edges to facilitate welding to bodywork |
| 01/31/1991 | DE3935956C1 Method of ultrasonic testing of building materials using transformer - which is placed against building surface and speed indicator used to determine fibre length to width ratio |
| 01/30/1991 | EP0410685A2 System for reducing noise level in vehicular cabin |
| 01/30/1991 | EP0410591A2 System for deploying horizontal line array |
| 01/30/1991 | EP0410078A1 Sound absorption for the oil sump of a motor vehicle and method for its mounting |
| 01/29/1991 | US4989252 Silencer |
| 01/29/1991 | US4989143 Adaptive coherent energy beam formation using iterative phase conjugation |
| 01/25/1991 | CA2020202A1 System for deploying horizontal line array |
| 01/24/1991 | WO1991001034A2 An acoustic liner |
| 01/23/1991 | EP0409462A1 Inertia force generating device |
| 01/23/1991 | EP0213163B1 Sound attenuation box |
| 01/22/1991 | US4987598 Active acoustic attenuation system with overall modeling |
| 01/22/1991 | US4987563 Synthetic aperture minimum redundancy sonar apparatus |
| 01/17/1991 | DE3921968A1 Sound damping engine mounting - has cylindrical block of elastic material bonded to inelastic mass |
| 01/17/1991 | DE3902765A1 Device for transmitting plane waves from a vibration transmitter with periodic excitation (generation of plane waves) in a fluid, cylindrical guidance system onto the object surface |
| 01/15/1991 | US4985925 Active noise reduction system |
| 01/15/1991 | US4985874 Solid state sequencing switch |
| 01/15/1991 | CA2020801A1 Inertia force generating device |
| 01/10/1991 | WO1991000058A1 Holder for a sensor in the echography of an infant's hip |
| 01/10/1991 | DE3920705A1 Digital processor displaying direction data from acoustic receivers - uses arrangement of summing modules to capture and process data for capture and process data for overall summing module |
| 01/09/1991 | EP0407014A1 Self-supporting sound barrier |
| 01/08/1991 | US4984218 Marine acoustic array configured for tow noise reduction |
| 01/08/1991 | US4983970 Method and apparatus for digital phased array imaging |
| 01/08/1991 | US4982924 Mounting apparatus for sonar transducer |
| 01/08/1991 | US4982724 Endoscope apparatus |
| 01/08/1991 | CA1278751C Active attenuation system with increased dynamic range |
| 01/03/1991 | DE3920885A1 Ultrasonic shock wave sensor - with non-piezoelectric polymeric dielectric, for lithotriptor |
| 01/03/1991 | DE3733844A1 Protection of submarines from underwater explosions - using layer of soft plastics in which pressure-tight hollow spheres are embedded |
| 01/02/1991 | EP0405581A1 Sound absorber |
| 01/02/1991 | EP0405331A2 Acoustic sensing device with noise cancellation |
| 01/02/1991 | EP0405158A1 Intermediate frame for spinning or twisting machines and method for producing the intermediate frame |
| 01/01/1991 | US4982436 Dual horn folded soundpath loudspeaker |
| 01/01/1991 | US4982386 Underwater acoustic waveguide transducer for deep ocean depths |
| 01/01/1991 | US4982385 Acoustic decoupler for a sonar array |
| 01/01/1991 | US4981169 Flexible acoustic baffle for staggered tube banks |
| 12/27/1990 | WO1990016061A1 Ultrasonic scanning sensor |
| 12/27/1990 | WO1990015667A1 Centrifugal separator |
| 12/27/1990 | CA1278369C Acoustic transducer system |
| 12/26/1990 | CN1010983B Boresonic inspection system |
| 12/25/1990 | US4980872 Transducer position control |
| 12/25/1990 | US4979500 Extracorporeal lithotripsy apparatus with transversely adjustable focus region |
| 12/19/1990 | EP0403349A1 Echography probe |
| 12/19/1990 | EP0402410A1 Ultrasound localization and therapy system |
| 12/19/1990 | CN1047933A Nature transmitter conductor for transmitting human voice to hearing system |
| 12/18/1990 | US4977898 Miniaturized encapsulated ultrasonic transducer |
| 12/18/1990 | US4977780 Ultrasonic probe device |
| 12/18/1990 | CA1278087C Ultrasonic imaging system |
| 12/18/1990 | CA1278086C Sound location arrangement |
| 12/18/1990 | CA1277922C Process for constructing a structural element that absorbs airborne sound |
| 12/13/1990 | DE3919133A1 Multi-directional hydrophone with transducers and trimming capacitors - has side lobe level lowered considerably by series capacitors redn. charge sensitivity to wide variations |
| 12/11/1990 | US4977600 Sound attenuation system for personal seat |
| 12/11/1990 | US4976334 Noise reducing tool and method |
| 12/11/1990 | US4976150 Ultrasonic transducers |
| 12/05/1990 | EP0400133A1 Sound reflection unit and audio loudspeaker unit comprising such a sound reflection unit |
| 12/04/1990 | US4975966 Reducing microphone puff noise |
| 12/04/1990 | US4975799 In neoprene waterproof envelops |
| 12/04/1990 | US4974590 Ultrasonic probe for use in ultrasonic endoscope |
| 12/04/1990 | US4974558 Ultrasonodiagnostic tomography apparatus |
| 11/29/1990 | WO1990014738A1 Ultrasonic probe and method of producing the same |
| 11/29/1990 | WO1990014175A1 Device for ultrasonic treatment of articles in a liquid medium |
| 11/29/1990 | DE3916632A1 Ultrasonic sensor with ultrasonic transmitter(s) - has sensor coupled channel with first chamber of same size as transmitter in direction orthogonal to sound propagation |
| 11/27/1990 | US4974211 Digital ultrasound system with dynamic focus |
| 11/27/1990 | US4973358 Method of producing lightweight foamed metal |
| 11/27/1990 | US4972839 Miniaturized mechanically-steerable ultrasonic probe |
| 11/27/1990 | US4972826 Shock wave generator for an extracorporeal lithotripsy apparatus |
| 11/22/1990 | EP0397960A1 Ultrasonic catheter guidance system |
| 11/22/1990 | EP0397869A1 Ultrasonic echo phasing circuit |
| 11/22/1990 | DE4014199A1 Ultrasonic transducer for measuring gas flow speeds - has piezoelectric ceramic plate with quarter-wave transformation film consisting bubbled glass |
| 11/22/1990 | DE3937465C1 Test head holder for ultrasonic testing installation - has adjuster with spherical bearing in carrier and engaging conical shell under spring pressure |
| 11/20/1990 | US4972381 Sonar testing apparatus |
| 11/20/1990 | US4970907 Transducer holder |