| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 12/21/1976 | US3999020 Transducer with variable frequency response |
| 12/21/1976 | US3999014 Padded furniture for reverent atmosphere |
| 12/21/1976 | US3998212 Electrode for percutaneous polarographic measurements |
| 11/30/1976 | US3995125 Protective grille |
| 11/30/1976 | US3995124 Noise cancelling microphone |
| 11/30/1976 | US3995113 Two-way acoustic communication through the ear with acoustic and electric noise reduction |
| 11/23/1976 | US3993879 Acoustical communications headset |
| 11/23/1976 | US3993162 Acoustic speaker system |
| 11/16/1976 | US3992693 Underwater transducer and projector therefor |
| 11/16/1976 | US3992017 Pickup cartridge |
| 11/09/1976 | US3991284 Gramaphone pickup |
| 11/02/1976 | US3989909 Grill for audio loudspeakers and the like |
| 11/02/1976 | US3989905 Microphone |
| 11/02/1976 | US3989895 Stethoscope transducer |
| 10/19/1976 | US3987258 Water-proof sound apparatus |
| 10/19/1976 | US3987245 Compensated speaker-microphone |
| 10/12/1976 | US3985960 Stereophonic sound reproduction with acoustically matched receiver units effecting flat frequency response at a listener's eardrums |
| 10/12/1976 | US3985200 Background sound system and apparatus for masking speech |
| 10/12/1976 | US3984885 4-Channel headphones |
| 10/05/1976 | US3984636 Quadraphonic headphone with ambience programmer |
| 10/05/1976 | US3984635 Low range loudspeaker system |
| 09/28/1976 | US3983335 Stylus assembly and transducer using same |
| 09/28/1976 | US3983333 Loud speaker system |
| 09/28/1976 | US3982607 Loudspeaker cabinet having an integrally constructed horn |
| 09/21/1976 | US3982142 Piezoelectric transducer assembly and method for generating a cone shaped radiation pattern |
| 09/14/1976 | US3980984 Underwater connector |
| 09/14/1976 | US3980829 Wide angle cylindrical wave loudspeaker extending approximately from floor to ceiling height with a lens |
| 09/14/1976 | US3980154 Cabinet for improving the sound output of an amplifier |
| 09/07/1976 | US3978941 Speaker enclosure |
| 08/31/1976 | US3978353 Piezoelectric acoustic speaker system |
| 08/24/1976 | US3976838 High fidelity sound reproduction system |
| 08/24/1976 | US3976830 Apparatus and method for embossing information on a disc |
| 08/24/1976 | US3976162 Personal speaker system |
| 08/17/1976 | US3975599 Non-directional hearing aid |
| 08/10/1976 | US3973839 Special effects generation and control system for motion pictures |
| 08/03/1976 | US3972385 Horn speaker |
| 07/27/1976 | US3971889 Portable bar adapted for mounting electronic equipment |
| 07/20/1976 | US3970878 Piezoelectric transducer unit and hydrophone assembly |
| 07/13/1976 | US3969583 Method of stereophonic recording |
| 06/29/1976 | US3967065 Plexiglas speakers |
| 06/22/1976 | US3964751 Phonograph cartridge replaceable stylus assembly |
| 06/22/1976 | US3964571 Acoustic system |
| 06/15/1976 | US3963881 Unidirectional condenser microphone |
| 06/08/1976 | US3962544 Sound reproducing devices |
| 06/08/1976 | US3962543 Method and arrangement for controlling acoustical output of earphones in response to rotation of listener's head |
| 06/08/1976 | US3961797 Vacuum deposited beryllium on aluminium pipe |
| 06/08/1976 | US3961684 Omni-directional sound system |
| 05/18/1976 | US3958237 Acoustic to pulse code transducer |
| 04/27/1976 | US3953675 Audio speaker system |
| 04/27/1976 | US3952834 Embedded type speaker with over lying grill |
| 04/20/1976 | US3952171 Stereo phonograph cartridge |
| 04/20/1976 | US3952159 Ducted port reflex enclosure |
| 03/30/1976 | US3947708 Apparatus for and method of converting from a digital signal to an acoustic wave using a piezoelectric beam |
| 03/30/1976 | US3947646 Resilient microphone mounting |
| 03/23/1976 | US3946316 Radio-pillow device |
| 03/23/1976 | US3946149 Apparatus for embossing information on a disc |
| 03/23/1976 | US3945461 Sound speaker system |
| 03/16/1976 | US3944759 Microphone provided with a cylindrically shaped microphone cartridge |
| 03/16/1976 | US3944757 High-fidelity moving-coil loudspeaker |
| 03/16/1976 | US3944756 Electret microphone |
| 03/09/1976 | US3943304 Headphone operating on the two-way system |
| 03/02/1976 | US3941638 Or front of most manufactured sound speaker enclosures) and process |
| 03/02/1976 | US3941207 Loudspeaker assembly |
| 02/24/1976 | US3940576 Loudspeaker having sound funnelling element |
| 02/24/1976 | US3940575 Directional microphone |
| 02/17/1976 | US3938618 Speaker grille screen and mounting structure |
| 02/17/1976 | US3938617 Speaker enclosure |
| 02/17/1976 | US3938616 Sound multiplier |
| 02/03/1976 | US3935925 Horn unit for a speaker |
| 01/20/1976 | US3934100 Acoustic coupler for use with auditory equipment |
| 01/13/1976 | US3931867 Wide range speaker system |
| 01/06/1976 | US3930561 Low distortion pyramidal dispersion speaker |
| 01/06/1976 | US3930560 Damping element |