| Patents for H04R 9 - Transducers of moving-coil, moving-strip, or moving-wire type (11,486) |
|---|
| 07/11/1979 | EP0002956A1 Pick-up |
| 07/11/1979 | EP0002955A1 A moving-coil pickup |
| 07/10/1979 | CA1058315A1 Loudspeaker voice coil arrangement |
| 07/03/1979 | US4160268 Signal pickup device with tracking control and jitter compensation for a video disc |
| 07/03/1979 | US4160133 Moving voice coil loudspeaker with magnetic damping increasing at large excursions |
| 07/03/1979 | US4160132 Electromagnetic acoustic transducer with its air gap established at assembly by counteracting springs |
| 06/19/1979 | US4158756 Dynamic loudspeaker with plastic basket encapsulating front pole plate |
| 05/29/1979 | US4156801 Pattern voice coil loudspeaker with baffles touching diaphragm |
| 05/15/1979 | CA1054527A1 Electrodynamic transducer with annular gap in flux path |
| 05/01/1979 | US4152727 Reproducing transducer capable of tracking control |
| 03/27/1979 | US4146756 Moving voice coil transducer with diaphragm having concentric sections of opposite curvature |
| 03/20/1979 | US4145582 Moving coil pickup having a substantially square magnetic armature mounted in an air gap adjacent a square face magnetic member |
| 03/20/1979 | CA1051113A1 Piston loudspeaker |
| 03/13/1979 | US4144416 Unitary tuned port and loudspeaker frame |
| 03/13/1979 | US4143738 Loudspeaker driver unit |
| 03/13/1979 | US4143537 Method for the manufacture of loud speakers |
| 03/06/1979 | CA1050156A1 Membrane for electroacoustic converter systems |
| 02/20/1979 | CA1049133A1 Loudspeaker |
| 02/13/1979 | US4139733 Electro acoustic transducer with improved diaphragm |
| 02/13/1979 | US4138896 Electrodynamic sound converter |
| 02/06/1979 | US4138593 Moving voice coil loudspeaker with heat dissipating enclosure |
| 02/06/1979 | US4138122 Pickup |
| 01/09/1979 | CA1045796A1 Manufacture of compacted coils |
| 01/02/1979 | CA1045707A1 Planar audio transducer |
| 12/19/1978 | US4130725 Split-coil speaker with direct coupling |
| 12/19/1978 | CA1044610A1 Loudspeaker systems |
| 11/21/1978 | CA1042812A1 Sound reproduction system and device |
| 11/14/1978 | CA1042544A2 Broad-band acoustic speaker |
| 11/14/1978 | CA1042543A2 Broad-band acoustic speaker |
| 11/07/1978 | US4124783 Phonographic pickup |
| 10/24/1978 | US4122314 Loudspeaker having a laminate diaphragm of three layers |
| 10/03/1978 | US4118605 Coil mount structure |
| 09/19/1978 | US4115667 Loudspeaker voice coil bearing |
| 08/15/1978 | US4107479 Electro-acoustic transducer |
| 07/18/1978 | US4100992 Loudspeaker |
| 06/06/1978 | US4093833 Moving coil cartridge with magnetic means to affix stylus holder to cartridge casing |
| 05/16/1978 | US4090039 Electrodynamic transducer |
| 05/09/1978 | US4088847 Speaker voice coil construction |
| 03/28/1978 | US4081627 Electromagnetic bipolar loud speaker |
| 01/31/1978 | US4071111 Weatherproof loudspeaker assembly and method of making same |
| 12/20/1977 | US4064376 Sound reproduction system and device |
| 12/06/1977 | US4061890 Loudspeaker with single layer rectangular wire voice coil wound on slit metal bobbin with a notch in the adjacent pole plate |
| 11/08/1977 | US4057694 Speaker diaphragm having flat response curve |
| 11/01/1977 | US4056697 Movable diaphragm connector method flexible hinge diaphragm surround and electro-acoustic transducer with folded diaphragm with intermediate flexible portions |
| 10/25/1977 | US4055732 Inboard type magnetic system for electro-dynamic transducer |
| 09/20/1977 | US4049926 Ribbon loudspeaker achieves focusing and uniformity of the magnetic flux in the working gap |
| 08/02/1977 | US4039044 Low frequency electro-acoustic transducer with interconnected diaphragms interleaved with fixed diaphragms |
| 07/19/1977 | US4037061 Planar pattern voice coil audio transducer |
| 07/12/1977 | US4035591 Electroacoustic transducers |
| 06/21/1977 | US4031337 Loudspeaker |
| 06/21/1977 | US4031335 Stereo pick-up with casing serving as common pole piece |
| 06/21/1977 | US4030564 Loud speaker with stable damping |
| 06/14/1977 | US4029911 Electro-acoustic transducer and method of manufacturing such a transducer |
| 06/14/1977 | US4029910 Wide dispersion loudspeaker with flexing diaphragm |
| 06/14/1977 | US4029171 Membrane for electroacoustic converter systems |
| 05/31/1977 | US4027111 Ribbon loudspeaker |
| 04/26/1977 | US4020296 Electroacoustic transducer |
| 04/12/1977 | US4017694 Method for making loudspeaker with magnetic fluid enveloping the voice coil |
| 03/22/1977 | US4013846 Piston loudspeaker |
| 03/08/1977 | US4011417 Dynamic type pickup |
| 02/15/1977 | US4008374 Loudspeaker systems |
| 01/04/1977 | US4001523 Ribbon loudspeaker |
| 01/04/1977 | US4001522 Ribbon type loudspeaker |
| 01/04/1977 | US4001519 Pick-up cartridges for gramophone records |
| 12/14/1976 | US3997739 Electrodynamic type electroacoustic transducer |
| 11/09/1976 | US3991286 Heat dissipating device for loudspeaker voice coil |
| 10/26/1976 | US3988025 Record disc cutting apparatus |
| 10/19/1976 | US3987245 Compensated speaker-microphone |
| 09/28/1976 | US3983337 Broad-band acoustic speaker |
| 09/07/1976 | US3979566 Electromagnetic transducer |
| 07/06/1976 | US3967367 Method for aligning loudspeaker diaphragm and voice coil assembly |
| 06/15/1976 | US3963882 Boron or graphite reinforced voice coil and manufacturing process |
| 06/15/1976 | US3963880 Moving coil-type cartridge |
| 06/08/1976 | US3961378 Cone construction for loudspeaker |
| 05/11/1976 | US3956599 Dome loudspeaker |
| 05/11/1976 | US3956598 Moving coil pickup cartridge with diaphragm coupling |
| 05/04/1976 | US3955055 Dynamic loudspeaker |
| 04/27/1976 | US3953687 Magnetic structure for moving voice coil loudspeaker |
| 03/16/1976 | US3944757 High-fidelity moving-coil loudspeaker |
| 02/24/1976 | US3940575 Directional microphone |
| 02/24/1976 | US3939942 Electroacoustic transducers |
| 02/17/1976 | US3939312 Pattern voice coil transducer having permanent magnet plates of a single polarity |
| 02/10/1976 | US3937905 Moving voice coil transducer having a flat diaphragm of an impregnated knit |
| 01/27/1976 | US3935402 Loudspeaker voice coil arrangement |
| 01/27/1976 | US3935400 Oval dome type speaker |
| 01/27/1976 | US3935399 Loud speakers |