| Patents for H04R 11 - Transducers of moving-armature or moving-core type (1,828) |
|---|
| 07/25/1978 | US4103116 Pickup cartridge with moving magnet armature |
| 03/14/1978 | US4079430 Magnetic head |
| 02/21/1978 | US4075418 Stereophonic pickup cartridge |
| 02/07/1978 | US4072823 Moving magnet pickup cartridge |
| 01/10/1978 | US4067582 Stylus suspension |
| 10/18/1977 | US4054758 Mounting of pickup stylus |
| 09/27/1977 | US4050341 Electromagnetic pickup for stringed musical instruments |
| 07/19/1977 | US4037060 Stereophonic pickup cartridge |
| 06/21/1977 | US4031336 Electromagnetic pickup with magnetic gap displacement generator |
| 06/21/1977 | US4031335 Stereo pick-up with casing serving as common pole piece |
| 05/24/1977 | USRE29232 Magnetic stereophonic phonograph pickup |
| 03/08/1977 | US4011417 Dynamic type pickup |
| 03/01/1977 | US4010334 Moving magnet contact acoustic transducer |
| 03/01/1977 | US4009885 Stereo phonograph pick-up cartridge |
| 01/18/1977 | US4004108 Armature for sound pick-up cartridge |
| 01/11/1977 | US4002863 Transducer and method of making same |
| 01/04/1977 | US4001519 Pick-up cartridges for gramophone records |
| 12/28/1976 | US4000381 Moving magnet transducer |
| 11/16/1976 | US3992017 Pickup cartridge |
| 11/09/1976 | US3991284 Gramaphone pickup |
| 10/19/1976 | US3987256 Grooved record playback system with multiple transducers |
| 10/19/1976 | US3987255 Pickup-cartridge with moving magnet |
| 09/28/1976 | US3983335 Stylus assembly and transducer using same |
| 06/22/1976 | US3964752 Methods and devices for recording, engraving and reproducing modulated information in tetraphony |
| 06/22/1976 | US3964751 Phonograph cartridge replaceable stylus assembly |
| 05/04/1976 | US3954273 Phonograph pickup cartridge |
| 02/10/1976 | US3937904 Moving magnet electroacoustic transducer |
| 01/27/1976 | US3935398 Transducer with improved armature and yoke construction |