| Patents for H04R 9 - Transducers of moving-coil, moving-strip, or moving-wire type (11,486) |
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| 11/12/1987 | DE3614313A1 Dynamic loudspeaker |
| 10/28/1987 | EP0242856A2 Coaxial loud speaker |
| 10/27/1987 | US4703510 Electro-acoustic transducer with diaphragm and blank therefor |
| 10/08/1987 | DE3611120A1 Loudspeaker system for uniform all-round radiation of higher sound frequency components |
| 10/07/1987 | CN87100528A Wide-band loudspeaker having diaphragm area divided into sub-areas for various frequency ranges |
| 09/30/1987 | CN86101901A Photo-electric microphone |
| 09/24/1987 | DE3609832A1 Loudspeaker |
| 09/09/1987 | EP0235991A2 Cone loudspeakers |
| 09/09/1987 | EP0235838A1 Electrodynamic transducer |
| 09/02/1987 | EP0234076A1 Electrodynamic loudspeaker |
| 08/27/1987 | DE3630247C1 Electrodynamic loudspeaker |
| 08/19/1987 | EP0232760A2 Broad band loudspeaker provided with a membrane surface divided into a plurality of parts corresponding to a plurality of frequency bands |
| 07/14/1987 | US4680800 Moving-coil loudspeaker unit |
| 07/14/1987 | US4680492 Audio-frequency electromechanical vibrator |
| 07/02/1987 | DE3546185A1 Colour television receiver with a picture tube |
| 06/23/1987 | US4675907 Electro-vibration transducer |
| 06/23/1987 | US4675859 Intensified field focus moving coil phonocartridge assembly |
| 06/09/1987 | US4672675 Multiple speaker loudspeaker with conductive bridge |
| 05/21/1987 | WO1987003157A1 A magnetic system |
| 05/21/1987 | DE3638727A1 Compact electroacoustic transformer |
| 05/21/1987 | DE3638693A1 Compact electroacoustic transformer |
| 05/12/1987 | US4665550 Electrodynamic loudspeaker having omnidirectional sound emission |
| 04/28/1987 | US4661973 Minimization of distortion due to a voice coil displacement in a speaker unit |
| 04/23/1987 | DE3537122A1 Colour television receiver having a picture tube |
| 03/31/1987 | US4654486 Poor-scatter pot magnet system for magnetic-dynamic loudspeakers or acoustic transducers |
| 03/31/1987 | CA1219811A1 Loudspeaker system and loudspeaker for use in a loudspeaker system for converting an n-bit digitized electric signal into an acoustic signal |
| 03/25/1987 | EP0214958A1 Method and devices for making electro-acoustic transducer apparatus |
| 03/24/1987 | US4653103 Loudspeaker structure and system |
| 03/11/1987 | CN85106771A Loud-speaker diaphragm of simple sound reproducer |
| 02/25/1987 | EP0211348A2 Communication engineering device provided with a loudspeaker |
| 02/03/1987 | US4641345 Body-sensible acoustic device |
| 02/03/1987 | US4640382 Acoustic frictional resistance construction and method of producing an acoustic frictional resistance using a laser |
| 01/21/1987 | EP0208907A1 Magnetic system for a dynamic loudspeaker |
| 01/13/1987 | US4637009 Grounding circuit for pickup cartridge moving coil |
| 01/13/1987 | US4635750 Loudspeaker diaphragm |
| 01/07/1987 | CN86100615A Loudspeaker and its mfg. process |
| 01/02/1987 | DE3521845A1 Electrodynamic loudspeaker |
| 12/23/1986 | US4630358 Method of making an electrostatic transducer of the moving coil type |
| 12/10/1986 | EP0204386A1 Electrodynamic transducer comprising a two-part diaphragm |
| 12/09/1986 | US4628154 Annular gap magnet system, particularly for low frequency loudspeakers |
| 12/09/1986 | CA1214997A1 Loudspeaker system and loudspeaker for use in a loudspeaker system for converting an n-bit digitized electric signal into an acoustic signal |
| 11/12/1986 | EP0201101A2 Electrodynamic loudspeaker |
| 11/05/1986 | EP0200257A1 Electrodynamic transducer of the isophase or ribbon type |
| 10/29/1986 | CN85103929A Vibrating plate loudspeaker |
| 10/28/1986 | US4619342 Multiple sound transducer system utilizing an acoustic filter to reduce distortion |
| 10/22/1986 | CN85103167A Horn speaker |
| 10/21/1986 | CA1213032A1 Electro-acoustic transducer with diaphragm and blank therefor |
| 10/21/1986 | CA1213031A1 Flat-diaphragm transducer and method of manufacturing such a transducer |
| 10/15/1986 | EP0197605A2 Moving part of a dynamic loudspeaker |
| 09/23/1986 | CA1211833A1 Large-excursion electroacoustic transducer |
| 09/16/1986 | US4612420 Loudspeaker system for converting a digitized electric signal into an acoustic signal |
| 09/10/1986 | EP0193886A2 Membrane for a plane loudspeaker |
| 09/10/1986 | CN86100040A Multi-use voice-coil-impedance loud speaker |
| 09/02/1986 | CA1210851A1 Dynamic telephone receiver with magnetic shunt |
| 08/26/1986 | US4608463 Electro-acoustic transducer |
| 08/19/1986 | US4607382 Electroacoustic transducer unit with reduced resonant frequency and mechanical spring with negative spring stiffness, preferably used in such a transducer unit |
| 08/19/1986 | CA1209926A1 Hybrid loudspeaker system, at option with one or more correction circuits |
| 08/12/1986 | US4604792 Method for making electro-acoustic transducer apparatus |
| 07/23/1986 | EP0064553B1 Electro-acoustic transducers |
| 07/22/1986 | US4601764 Method for producing anistropic configuration magnet |
| 07/03/1986 | WO1986003928A1 Method and devices for making electro-acoustic transducer apparatus |
| 07/01/1986 | US4598178 Means for critically damping a dynamic loudspeaker |
| 06/17/1986 | US4595801 Coupled dual cone velocity driver speaker |
| 06/03/1986 | US4593404 Method of improving the acoustics of a hall |
| 05/27/1986 | US4591672 Loud speaker assembly |
| 05/27/1986 | US4591667 Dome speaker with cut-out portions in the voice coil bobbin |
| 05/20/1986 | US4590333 Multidriver loudspeaker |
| 05/20/1986 | US4590332 Phase coherent low frequency speaker |
| 05/13/1986 | CA1204498A1 Multi-driver loudspeaker |
| 04/29/1986 | US4586192 Soundstage boundary expansion system |
| 04/29/1986 | CA1203885A1 Loudspeaker construction and method of assembly |
| 04/22/1986 | US4584439 Audio transducer with controlled flexibility diaphragm |
| 04/22/1986 | US4584438 Percussion air motor |
| 04/08/1986 | CA1203014A1 Speaker diaphragm |
| 04/01/1986 | US4580119 Iron, chromium, and cobalt alloy tube section and radial flange segment |
| 04/01/1986 | US4580015 Loud speaker with minimized magnetic leakage |
| 04/01/1986 | US4580014 Means for controlling ribbon edge clearance in a ribbon loudspeaker |
| 03/18/1986 | US4577069 Electroacoustical transducer |
| 03/11/1986 | CA1201798A1 Electro-acoustic transducer having a diaphragm comprising a layer of polymethacrylimide foam |
| 03/05/1986 | CN85201746U Loudspeaker with a flat vibrating plate |
| 03/05/1986 | CN85201677U Horn loudspeaker |
| 02/13/1986 | EP0113732A4 Electromagnetic-acoustic transducer. |
| 02/05/1986 | EP0170056A1 Electrical flat coil actuator |
| 01/29/1986 | EP0169792A1 Telephonic receiving unit compatible with a prosthetic device for the aurally handicapped |
| 01/28/1986 | US4567327 Flat-diaphragm transducer and method of manufacturing such a transducer |
| 01/28/1986 | US4566178 Process for assembling a cone speaker |
| 01/28/1986 | CA1199875A1 Subwoofer speaker system |
| 01/21/1986 | US4566120 Loudspeaker system and loudspeaker for use in a loud-speaker system for converting an n-bit digitized electric signal into an acoustic signal |
| 01/21/1986 | US4565905 Loudspeaker construction |
| 01/14/1986 | US4564727 Subwoofer speaker system |
| 01/14/1986 | CA1199397A1 Ribbon-type electro-acoustic transducer with low distortion and improved sensitivity |
| 01/03/1986 | WO1986000189A1 Multidriver loudspeaker |
| 12/18/1985 | EP0164942A2 Multidriver loudspeaker |
| 12/17/1985 | US4559584 Combination lighting device and loudspeaker |
| 12/10/1985 | US4558443 Moving coil type pickup cartridge |
| 11/26/1985 | US4555797 Hybrid loudspeaker system for converting digital signals to acoustic signals |
| 11/12/1985 | US4552242 Coaxial type composite loudspeaker |
| 11/06/1985 | EP0160478A2 Improved moving-coil loudspeaker unit |
| 11/06/1985 | EP0160279A2 Improved grounding circuit for moving coil pickup cartridge |
| 11/05/1985 | US4551849 Vehicle panel speaker for automotive audio system utilizing part of a vehicle panel as a sound-producing medium |