| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 08/14/1984 | US4465905 Loudspeaker assembly |
| 08/14/1984 | US4465587 Process for the hydroliquefaction of heavy hydrocarbon oils and residua |
| 08/14/1984 | US4465160 Horn speaker |
| 08/14/1984 | CA1172744A1 Speaker unit for headphones |
| 08/14/1984 | CA1172575A1 Acoustic energy systems |
| 08/08/1984 | EP0114951A1 Stereophonic loudspeaker box |
| 08/08/1984 | EP0114828A1 Oto-laryngeal communication system |
| 08/07/1984 | US4463648 Angled humbucking pick-up for an electrical musical instrument of the stringed type |
| 08/02/1984 | WO1984002834A1 A plate, especially for supporting sheets of music |
| 07/31/1984 | US4463223 Head phone |
| 07/31/1984 | US4463222 Noise canceling transmitter |
| 07/31/1984 | CA1171795A1 Phase shift low frequency loudspeaker system |
| 07/24/1984 | US4462112 Speaker system |
| 07/18/1984 | EP0113623A2 Construction and method for elongated towed underwater sonar |
| 07/17/1984 | US4460841 Ultrasonic transducer shading |
| 07/04/1984 | EP0112688A2 Multiple beam lens transducer with collimator for sonar systems |
| 07/03/1984 | US4457396 Sound deflector for headset ear phones |
| 07/03/1984 | CA1170193A1 Loudspeaker cabinet |
| 06/26/1984 | US4456849 Piezoelectric ultrasonic transducer with damped suspension |
| 06/26/1984 | US4456848 Ultrasonic transmitting and receiving device |
| 06/26/1984 | US4456797 Submersible personal stereo system |
| 06/26/1984 | US4456796 Unidirectional electret microphone |
| 06/26/1984 | CA1169781A1 Stylus assembly and process for making same |
| 06/20/1984 | EP0111408A1 Loudspeaker cabinets |
| 06/19/1984 | US4455675 Headphoning |
| 06/19/1984 | US4455457 Adjuster means for headset |
| 06/19/1984 | US4454927 Reentrant cone driven loudspeaker |
| 06/19/1984 | CA1169540A1 Biologic apparatus |
| 06/13/1984 | EP0110480A2 Phased array transducer apparatus |
| 06/12/1984 | CA1169144A1 Vibration sensor |
| 06/12/1984 | CA1168989A1 Loudspeaker enclosure |
| 06/12/1984 | CA1168988A1 Loudspeaker system |
| 06/05/1984 | US4453050 Earphone |
| 06/05/1984 | US4453047 Speaker mounting bracket |
| 06/05/1984 | US4453046 Elastic support for electroacoustic transducers |
| 06/05/1984 | US4453045 Microphone |
| 06/05/1984 | US4452333 Speaker system |
| 06/05/1984 | US4452083 Ultrasonic diagnosis device |
| 05/30/1984 | EP0109646A1 Pickup device for picking up vibration transmitted through bones |
| 05/29/1984 | US4451928 Multi-speaker system for use in automobiles |
| 05/29/1984 | US4451711 Readily portable speaker enclosure |
| 05/29/1984 | US4451019 Pole type speaker support structure |
| 05/29/1984 | US4450930 Microphone with stepped response |
| 05/29/1984 | US4450929 Acoustic energy systems |
| 05/22/1984 | US4450542 Multiple beam lens transducer for sonar systems |
| 05/22/1984 | US4450322 Adjustable speaker system and method of adjustment |
| 05/16/1984 | EP0108067A1 Loudspeaker box in the shape of a shell construction. |
| 05/15/1984 | US4449236 Anti-side tone transmitter |
| 05/15/1984 | US4449210 Fiber optic hydrophone transducers |
| 05/15/1984 | US4449020 Multi-position microphone stand support assembly |
| 05/09/1984 | EP0107843A1 Acceleration vibration detector |
| 05/02/1984 | EP0107592A2 Apparatus using a retractable microphone |
| 05/02/1984 | EP0107287A2 Ultrasonic beam focusing device with a concave surface and method of manufacturing the same |
| 05/01/1984 | US4445730 Speaker cabinet |
| 04/26/1984 | WO1984001681A1 Loudspeaker |
| 04/25/1984 | EP0106631A1 Ceramic microphone |
| 04/24/1984 | US4445229 Device for adjusting a movable electro-acoustic sound transducer |
| 04/24/1984 | US4445228 Motorcycle audio system |
| 04/24/1984 | US4445227 Loudspeaker having improved directional characteristics |
| 04/24/1984 | US4445005 Headphone |
| 04/24/1984 | CA1166166A1 Teleconference microphone arrays |
| 04/17/1984 | CA1165859A1 Electret microphone shield |
| 04/17/1984 | CA1165858A1 Acoustic impedance matching device |
| 04/10/1984 | US4442323 Microphone with vibration cancellation |
| 04/10/1984 | US4441577 Direction-variable speaker system |
| 04/10/1984 | CA1165248A1 Electro-acoustic transducer |
| 04/04/1984 | EP0104943A2 Stabilized fiber optic sensor |
| 04/04/1984 | EP0104929A2 Annular array ultrasonic transducers |
| 04/04/1984 | EP0104928A2 Ultrasonic diagnostic imaging systems for varying depths of field |
| 04/04/1984 | EP0104457A2 Piezoelectric transducer |
| 04/03/1984 | US4441176 Damping mechanism for a video disc stylus holder |
| 04/03/1984 | US4440260 Bass-reflex loudspeaker system |
| 04/03/1984 | US4440259 Loudspeaker system for producing coherent sound |
| 04/03/1984 | US4440258 Tunable stethoscope |
| 03/27/1984 | US4439645 Sound attenuating earcup assembly with outside communication capability |
| 03/27/1984 | US4439644 Loud speaker enclosure |
| 03/27/1984 | US4439643 System assembly for mounting electrical apparatus on walls and ceilings |
| 03/27/1984 | US4439641 Ultrasonic transducer for use in a vibratory environment |
| 03/27/1984 | CA1164355A1 Horn speaker |
| 03/27/1984 | CA1164241A1 Capacitive pressure transducer assembly with improved output lead design |
| 03/20/1984 | US4438163 Pad with shape adapting properties |
| 03/20/1984 | US4437541 Controlled dispersion speaker configuration |
| 03/20/1984 | US4437540 Loud-speaker |
| 03/20/1984 | US4437539 Speaker enclosure |
| 03/14/1984 | EP0102379A1 Improvements in pianos. |
| 03/13/1984 | US4437189 Sound system for a musical instrument |
| 03/13/1984 | US4437179 Phono pickup cartridge |
| 03/13/1984 | US4437032 Sensor for distance measurement by ultrasound |
| 03/13/1984 | US4436966 Conference microphone unit |
| 03/13/1984 | US4436178 Housing loudspeaker |
| 03/06/1984 | CA1163355A1 Mechanical filter for an electrodynamic transducer |
| 03/06/1984 | CA1163202A1 Loudspeaker or microphone arrangement having a direction - and frequency-independent behavior |
| 02/28/1984 | US4434507 Free standing transmitting microphone |
| 02/28/1984 | US4434329 Microphone device built in a tape recorder |
| 02/28/1984 | US4433749 Acoustic rear radiation absorption for loudspeaker systems |
| 02/22/1984 | EP0101292A2 Respirator speech transmitter |
| 02/22/1984 | EP0101031A2 Arrangement for sound sources avoiding acoustic short circuits in loudspeakers |
| 02/21/1984 | US4433398 Ultrasonic transducer |
| 02/21/1984 | US4433363 Audio light chandelier |
| 02/14/1984 | CA1162001A1 Pad with shape adapting properties |