| Patents for H04R 11 - Transducers of moving-armature or moving-core type (1,828) |
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| 12/16/1986 | US4630253 Electromagnetic pickup cartridge having elongate core elements |
| 12/09/1986 | CA1215162A1 Transducer with translationally adjustable armature |
| 10/15/1986 | CN85105323A Gramophone needle module on pickup seat |
| 09/02/1986 | CA1210851A1 Dynamic telephone receiver with magnetic shunt |
| 07/29/1986 | CA1208757A1 Tactile stimulation device for facilitating speech training of hearing-impaired individuals |
| 06/24/1986 | US4597071 Pickup cartridge of moving magnet type |
| 04/08/1986 | US4581496 Diaphragm for attenuating harmonic response in an electroacoustic transducer |
| 03/25/1986 | US4578808 Electro-acoustic transducers |
| 02/04/1986 | CA1200307A1 Electro-acoustic transducers |
| 01/14/1986 | CA1199398A1 Electromagnetic transducer |
| 08/07/1985 | EP0150825A2 Improved circuit connection for coils wound on yoke of an electromagnetic pickup cartridge |
| 06/18/1985 | US4524439 Electromagnetic pickup cartridge with flux sensors mounted above moving magnet |
| 05/28/1985 | US4520238 Pickup device for picking up vibration transmitted through bones |
| 05/21/1985 | US4518831 Transducer with translationally adjustable armature |
| 05/02/1985 | EP0139302A2 Audio-frequency electromechanical vibrator |
| 04/02/1985 | CA1184963A1 Transducer with adjustable armature yoke and method of adjustment |
| 01/15/1985 | US4494227 Stereo phono pick-up and/or cutter |
| 01/08/1985 | US4493071 Pickup cartridge |
| 01/02/1985 | CA1180437A Electro acoustic planar transducer |
| 12/27/1984 | CA1179950A Pick-up and/or cutter |
| 12/05/1984 | EP0127247A2 Tunable response transducer |
| 11/20/1984 | CA1178211A1 Pick-up and/or cutter |
| 10/02/1984 | CA1175548A1 Telephone transducers |
| 09/25/1984 | US4473722 Electroacoustic transducers |
| 09/04/1984 | CA1173757A1 Pickup cartridge |
| 06/26/1984 | US4456984 Magnetic pick-up and/or cutter cartridge |
| 05/30/1984 | EP0109646A1 Pickup device for picking up vibration transmitted through bones |
| 05/15/1984 | CA1167567A1 Piezoelectric transducer for recording video information |
| 04/17/1984 | US4443667 Electromagnetic transducer |
| 02/07/1984 | US4430520 Transducer shielding enclosure |
| 01/24/1984 | US4427958 Telephone transducers |
| 01/10/1984 | US4425482 Ring armature electroacoustic transducer |
| 11/30/1983 | EP0094992A1 Electroacoustic transducers |
| 10/18/1983 | US4410769 Transducer with adjustable armature yoke and method of adjustment |
| 09/14/1983 | EP0088154A1 Speech stimulating device |
| 08/09/1983 | CA1151557A1 Electromagnetic transducer for converting mechanically acoustic events into alternating voltages |
| 08/02/1983 | US4397012 Electrodynamic pickup cartridge having simplified coil structure |
| 07/06/1983 | EP0083174A1 Electro-acoustic transducers |
| 06/14/1983 | US4387788 Diaphragm pressure ring for tone generators |
| 05/31/1983 | US4386244 Electromagnetic transducer |
| 05/31/1983 | CA1147269A1 Pickup cartridge |
| 05/24/1983 | US4385210 Electro-acoustic planar transducer |
| 05/10/1983 | US4383310 Pickup cartridge of movable magnet type |
| 05/10/1983 | CA1146082A1 Electromagnetic pickup cartridge |
| 04/19/1983 | US4380689 Electroacoustic transducer for hearing aids |
| 03/23/1983 | EP0074818A1 Improvements in or relating to telephone transducers |
| 03/15/1983 | CA1143050A1 High accuracy bass reproducer device |
| 02/01/1983 | CA1140666A1 Electroacoustic device |
| 01/11/1983 | US4368528 Pickup cartridge |
| 01/04/1983 | US4367544 Electromagnetic transducers for converting mechanically acoustic events into alternating voltages |
| 11/23/1982 | US4360711 Magnetic electro-acoustic transducer construction |
| 10/27/1982 | EP0063392A1 Pick-up and/or cutter |
| 10/05/1982 | US4353125 Electromagnetic pickup cartridge |
| 09/28/1982 | US4352176 Electromagnetic pickup cartridge |
| 09/14/1982 | US4349902 Piezoelectric transducer for recording video information |
| 08/17/1982 | CA1129982A1 Cutaneous communication device |
| 08/11/1982 | EP0057476A2 Pick-up and/or cutter |
| 05/18/1982 | US4330878 Sound producing device for watches |
| 04/27/1982 | CA1122694A1 Telephone transducer assembly and method of making same |
| 03/31/1982 | EP0048434A1 Electro acoustic planar transducer |
| 09/15/1981 | CA1108997A1 Electromagnetic pickup cartridge |
| 07/01/1981 | EP0031122A1 Electromagnetic pickup cartridge |
| 06/17/1981 | EP0030311A1 Electromagnetic pickup cartridge |
| 06/09/1981 | US4272654 Acoustic transducer of improved construction |
| 06/02/1981 | US4271335 Pickup cartridge having a resilient biasing member for holding an elongated stylus holder against a support surface thereof |
| 05/26/1981 | US4269103 Electromagnetic pickup for stringed musical instruments |
| 05/05/1981 | US4266287 Transducer systems with controlled damping |
| 04/07/1981 | CA1099015A1 Malfunction detector for a dictation system |
| 03/24/1981 | US4258432 Electro-acoustic device for alarm watch |
| 03/24/1981 | US4258234 Made from an alloy of iron, chromium, and cobalt, and a second alloy of iron and aluminum |
| 02/10/1981 | US4249747 Phonograph pick-up cartridge |
| 02/04/1981 | EP0023435A1 Phonograph pick-up cartridge |
| 01/20/1981 | US4246450 Telephone transducer assembly and method of making same |
| 12/23/1980 | US4241241 Electromechanical record disk dynamic range expander |
| 12/10/1980 | EP0019791A1 Electromagnetic transducer |
| 12/02/1980 | US4237347 Electrodynamic transducer with longitudinally moving magnet |
| 09/09/1980 | US4221937 Moving iron type cartridge |
| 07/10/1980 | WO1980001428A1 Electrodynamic pick-up head |
| 06/24/1980 | US4209669 Pick-up cartridge |
| 05/20/1980 | CA1077858A1 Electrodynamic type cartridge |
| 04/01/1980 | CA1074706A1 Stylus vibrating mechanism in pickup cartridge |
| 03/25/1980 | US4194744 Natural rubber, butyl rubber |
| 02/05/1980 | US4187452 Electromechanical torsional oscillator with resonant frequency and amplitude control |
| 01/01/1980 | CA1069057A Mounting of pickup stylus |
| 12/04/1979 | US4177360 Moving magnet type pickup cartridge |
| 11/13/1979 | US4174111 Compressive pivot suspension system for an electromagnetic cartridge |
| 09/25/1979 | CA1063163A1 Electromechanical torsional oscillator with resonant frequency and amplitude control |
| 04/24/1979 | US4151379 Electromagnetic speaker with bucking parallel high and low frequency coils drives sounding board and second diaphragm or external apparatus via magnetic coupling and having adjustable air gap and slot pole piece |
| 04/17/1979 | CA1052704A1 Phonograph cartridge replaceable stylus assembly |
| 02/20/1979 | US4140886 Magnetic type pickup cartridge block shaped pole piece construction |
| 02/13/1979 | US4139742 Cutaneous communication device |
| 01/30/1979 | US4136884 Electromagnet type pickup device |
| 01/30/1979 | CA1047408A1 Magnetic type pickup cartridge |
| 11/21/1978 | US4126769 Moving armature transducer with reinforced and pivoted diaphragm |
| 11/07/1978 | US4124783 Phonographic pickup |
| 11/07/1978 | US4124782 Sound pickup having plastic enveloped pole plate to pole rod junction |
| 10/31/1978 | US4123067 Stylus vibrating mechanism in pickup cartridge |
| 09/12/1978 | CA1038300A1 Phonograph pickup cartridge |
| 08/22/1978 | US4109116 Hearing aid receiver with plural transducers |
| 07/25/1978 | US4103117 Pick-up cartridge |