| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 07/29/1980 | US4215250 Microphone support with simultaneous adjustment of plural degrees of freedom |
| 07/29/1980 | US4214645 Method of and means for loudspeaker sound wave distribution |
| 07/23/1980 | EP0013492A1 Method of producing tubular boron bodies suitable for use as pick-up cantilevers |
| 07/22/1980 | US4214298 Combination acoustic conditioner and light fixture |
| 07/22/1980 | US4213515 Speaker system |
| 07/15/1980 | US4213008 Loudspeaker enclosure for mid-wall location |
| 07/09/1980 | EP0012938A2 Ultrasonic transducer with optimal lateral resolution and method for its manufacture |
| 07/08/1980 | USRE30326 Panel hole closure |
| 07/08/1980 | US4211898 Headphone with two resonant peaks for simulating loudspeaker reproduction |
| 07/01/1980 | US4210784 Speaker system |
| 07/01/1980 | US4210778 Loudspeaker system with heat pipe |
| 07/01/1980 | US4210223 Low frequency folded exponential horn loudspeaker apparatus with bifurcated sound path |
| 07/01/1980 | CA1080844A1 Personal audio listening system |
| 06/25/1980 | EP0012176A1 Electret microphone |
| 06/24/1980 | CA1080343A1 Coil and microphone mounting for frequency correction in mechanical resonators |
| 06/17/1980 | US4208738 Deployable sonar array with interconnected transducers operated in the bending mode |
| 06/17/1980 | US4207963 Loudspeaker system |
| 06/11/1980 | EP0012070A1 Pneumatic speaker with constant fluid flow |
| 06/11/1980 | EP0011817A1 Directional microphone according to the interference principle |
| 06/10/1980 | US4207532 Frequency signal splitting circuit |
| 06/10/1980 | US4207430 Optical motional feedback |
| 06/10/1980 | US4206832 Drone acoustical transducer |
| 06/10/1980 | US4206831 Loudspeaker coupler |
| 06/10/1980 | US4206830 Vehicle speaker system provided with a passive radiator |
| 06/10/1980 | CA1079393A1 Transducer assembly and method for radiating and detecting energy over controlled beam width |
| 06/10/1980 | CA1079200A1 Earphone mounting in safety helmet for motorcycle riders |
| 06/10/1980 | CA1079199A1 Multiple driver loudspeaker system |
| 06/03/1980 | US4206324 Pivoted plural microphone assembly |
| 06/03/1980 | US4205856 Pickup cartridge |
| 05/29/1980 | WO1980001127A1 Electroacoustic transducer filter assembly |
| 05/20/1980 | US4204236 Speaker device having a holding means for a superminiature tape recorder |
| 05/20/1980 | US4204096 Sonic transducer mounting |
| 05/13/1980 | US4203165 Acoustic filter |
| 05/13/1980 | US4202348 Korotkov sound sensor |
| 05/06/1980 | US4201274 Symmetrical speaker having structural reinforcing ports |
| 05/06/1980 | US4201107 Audio power percussion pickups |
| 04/29/1980 | US4200170 Pyramid speaker assembly |
| 04/22/1980 | US4199667 Microphone having means for suppressing structure-borne sounds |
| 04/22/1980 | US4199657 Planar sound reproducing speaker system |
| 04/22/1980 | US4198880 Rotor drive for pulsato apparatus |
| 04/22/1980 | CA1076033A1 Sound projection system |
| 04/16/1980 | EP0009818A1 Dynamic pick-up cartridge for a record player |
| 04/15/1980 | US4198058 Pick-up with exchangeable stylus |
| 04/08/1980 | US4196792 Laminar flow vented speaker enclosure |
| 04/08/1980 | US4196791 Speaker grill including stress regions |
| 04/08/1980 | US4196790 Acoustic transducer having multiple frequency resonance |
| 04/01/1980 | CA1074904A1 Communications headset with mounting means |
| 04/01/1980 | CA1074706A1 Stylus vibrating mechanism in pickup cartridge |
| 03/25/1980 | US4194744 Natural rubber, butyl rubber |
| 03/25/1980 | US4194590 Loudspeaker horn with adjustable angle of dispersion |
| 03/25/1980 | CA1074236A1 Acoustic speaker system using pulse code modulated signals |
| 03/19/1980 | EP0008772A1 Loudspeaker enclosure |
| 03/18/1980 | US4194096 Microphone shock mount and assembly |
| 03/18/1980 | US4194095 Fluid flow control speaker system |
| 03/11/1980 | US4192977 Highly directional ultrasonic electret transducer |
| 03/04/1980 | US4191865 Loudspeaker padring and method of making the same |
| 03/04/1980 | CA1073092A1 Device for echography by means of focussed ultrasonic beams |
| 02/26/1980 | US4190739 High-fidelity stereo sound system |
| 02/26/1980 | US4190738 Modular furniture structure |
| 02/26/1980 | US4189969 Pickup unit and pickup assembly for musical instrument |
| 02/26/1980 | US4189788 Headset |
| 02/20/1980 | EP0008274A1 Unidirectional acoustical enclosure |
| 02/19/1980 | US4189627 Electroacoustic transducer filter assembly |
| 02/19/1980 | CA1072202A1 One-point stereo microphone |
| 02/12/1980 | US4188549 Acoustically responsive sensor switch |
| 02/12/1980 | CA1071684A1 Joining |
| 02/06/1980 | EP0007569A1 Loudspeaker box |
| 02/06/1980 | EP0007453A1 Varying loudspeaker spatial characteristics |
| 02/06/1980 | EP0007436A1 Electro-acoustic transducer with a membrane having a piezoelectric layer |
| 01/23/1980 | EP0007036A1 Electroacoustic transducer |
| 01/22/1980 | US4185175 Cushioned extension for telephone earpiece |
| 01/22/1980 | US4185167 Sound masking package |
| 01/22/1980 | US4184563 Planar diaphragm and supporting frame assembly |
| 01/22/1980 | US4184562 Multi-directional assemblies for sonic logging |
| 01/15/1980 | US4184094 Coupling for a focused ultrasonic transducer |
| 01/08/1980 | US4182931 360 Degree speakers |
| 01/08/1980 | US4182429 Loud-speaker system |
| 01/01/1980 | US4181193 Sound projection system |
| 01/01/1980 | US4181122 Device for measuring blood pressure |
| 01/01/1980 | CA1069233A Telephone hand set transmitter with improved output response |
| 01/01/1980 | CA1069057A Mounting of pickup stylus |
| 12/25/1979 | US4180710 Adjustably positioned phasing plug |
| 12/25/1979 | US4180140 Loudspeaker porting |
| 12/18/1979 | US4179589 Phono cartridge |
| 12/18/1979 | US4179585 Variable ratio full range direct-reflected pyramid inclined loudspeaker |
| 12/18/1979 | US4179009 Mounting arrangement for a loudspeaker to a resonance panel permitting front insertion assembly |
| 12/18/1979 | US4179008 Structure and arrangement for loudspeaker assemblage |
| 12/12/1979 | EP0005857A1 Method for transferring ultrasonic energy to or from an object and focused ultrasonic transducer |
| 12/11/1979 | US4178473 Two-way loudspeaker for vehicle |
| 12/11/1979 | US4177873 Loudspeaker equipment |
| 12/11/1979 | US4177872 Speaker system |
| 12/11/1979 | CA1067829A1 Binaural sound pickup |
| 12/04/1979 | US4176730 Speaker cabinet |
| 11/27/1979 | US4176253 Current loaded pneumatically driven loudspeaker arrangements |
| 11/27/1979 | US4176249 Deleterious mechanical vibrations from dynamic loudspeaker offset by additional dynamic device |
| 11/27/1979 | US4175552 Vibration device |
| 11/27/1979 | CA1067200A1 Condenser microphone |
| 11/27/1979 | CA1067199A1 Transducer device for found waves with automatic compensation |
| 11/20/1979 | CA1066630A1 Transducer with variable frequency response |
| 11/13/1979 | US4174469 Adjustable directivity microphone incorporated in a tape recorder casing |