| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 11/03/1993 | CN1078086A Sound box with extending inverted sound channel |
| 11/03/1993 | CN1078085A Bass sound box with two extending sound pipes |
| 11/02/1993 | US5258584 Multiple auxiliary compound driver loudspeaker system |
| 11/02/1993 | US5257420 Earmuffs for use with headphones |
| 10/30/1993 | CA2079401A1 Compressible stethoscope ear tip |
| 10/28/1993 | WO1993021742A1 Tandem transducer and magnet structure |
| 10/28/1993 | DE4213779A1 Headphone with pressure redn. and audio signal transmission system - is based on metallic bi-layer corrected for elasticity to linearise force exerted by headband on various size heads |
| 10/26/1993 | US5257243 Flexible acoustic array with polymer hydrophones |
| 10/19/1993 | US5253933 Speaker stand |
| 10/14/1993 | WO1993020551A1 An active noise cancellation apparatus for a motor vehicle |
| 10/13/1993 | EP0565369A2 Loudspeakers |
| 10/13/1993 | EP0564874A1 Two-way communications earset with filter |
| 10/12/1993 | US5253301 Nondirectional acoustic generator and speaker system |
| 10/12/1993 | US5253072 Device for fixing a microphone on a video camera |
| 10/12/1993 | US5251859 Support mount |
| 10/11/1993 | CA2093705A1 Loudspeakers |
| 10/07/1993 | DE4211114A1 Loudspeaker for car allowing use of hands-free telephone by driver - has vibrating section cover plate formed as lid of hood having sidewalls with at least one opening |
| 10/06/1993 | EP0564229A1 Headphone |
| 10/05/1993 | US5250763 Baffles |
| 09/30/1993 | WO1993019562A1 Dual element headphone |
| 09/29/1993 | EP0562789A1 Ceiling-mounted loudspeaker |
| 09/29/1993 | EP0562738A2 Microphone power supply |
| 09/28/1993 | US5249237 Audio transducer improvements |
| 09/28/1993 | US5249236 Wiring structure of loudspeaker |
| 09/28/1993 | US5249235 Microphone with concealed port |
| 09/28/1993 | CA1322533C Loudspeaker arrangement |
| 09/24/1993 | CA2091804A1 Wide coverage angle ceiling mounted loudspeaker |
| 09/21/1993 | US5246353 Air breezing pump |
| 09/21/1993 | CA2056990C Electromagnetic resonant vibrator |
| 09/21/1993 | CA2027265C Magnetically shielded electromagnetic acoustic transducer |
| 09/16/1993 | WO1993018604A1 Headset amplifier with automatic log on/log off detection |
| 09/15/1993 | EP0560576A2 Speaker system using a plurality of speaker units for directivity control |
| 09/15/1993 | EP0560415A2 Electro-acoustic transducer |
| 09/15/1993 | CN2142251Y Connecting device for audio-video combination etc. |
| 09/15/1993 | CN1076325A Hi-Fi technique for electric speaker |
| 09/15/1993 | CN1076324A Slender stereo amplifier |
| 09/08/1993 | CN2141957Y Lantern type hanging sound box |
| 09/08/1993 | CN2141956Y 传声器 Microphone |
| 09/07/1993 | US5243662 Electrodynamic sound generator for hearing aids |
| 09/07/1993 | US5241971 Ear-protection cup for ear muffs or head-phones |
| 09/07/1993 | CA1322042C Speaker |
| 09/07/1993 | CA1321951C Collapsible ear tip |
| 09/02/1993 | WO1993017356A1 Hydrophone arrangement |
| 09/02/1993 | CA2130430A1 Hydrophone arrangement |
| 08/31/1993 | US5241519 Hydrophone assembly with vibrations isolated transducer elements |
| 08/31/1993 | US5240221 For attenuating vibrations |
| 08/31/1993 | CA1321828C Acoustic window and material therefor |
| 08/25/1993 | EP0391933B1 Method and device for generating sound in a space for people |
| 08/24/1993 | US5239589 Low profile-pin mount-printed circuit board speaker |
| 08/24/1993 | US5239518 Low frequency sonar projector and method |
| 08/24/1993 | CA1321637C Microphone probe for acoustic measurement in turbulent flow |
| 08/19/1993 | WO1993015633A1 Seat having sound system with acoustic waveguide |
| 08/18/1993 | EP0555951A1 Loudspeakers |
| 08/18/1993 | EP0555497A1 Cantilever damping method and cartridge |
| 08/17/1993 | US5237543 Moment bender transducer drive |
| 08/12/1993 | DE4203811A1 Egg-shaped loudspeaker cabinet with three unequal semi-axes - eliminates standing waves by curvature of housing and reduces directional behaviour with min. sound wavefront area |
| 08/11/1993 | CN2140120Y Folding double-body microphone |
| 08/10/1993 | CA2046659C Loudspeaker and horn therefor |
| 08/04/1993 | EP0553525A1 Bodily sensed speakers |
| 08/04/1993 | EP0553499A2 Frequency-dependent amplitude modification devices for accoustic sources |
| 08/04/1993 | EP0553325A1 Probe for measuring acoustic fields of high intensity |
| 08/04/1993 | EP0553239A1 Method of improving the quality of sound reproduction and apparatus for carrying out said process comprising at least one loudspeaker emitting in three directions |
| 08/04/1993 | CN2139762Y Circuit panel with microphone |
| 08/03/1993 | US5233664 Speaker system and method of controlling directivity thereof |
| 08/03/1993 | US5233136 Horn loadspeaker |
| 07/28/1993 | CN1074794A Push-pull phase inversion loudspeaker box |
| 07/27/1993 | US5231560 Auto-insertable component |
| 07/21/1993 | EP0551845A1 Composite electroacoustic transducer |
| 07/21/1993 | EP0335892B1 Method for correcting the amplitude/frequency response of an electro-acoustic transducing system and corresponding transducer assembly |
| 07/20/1993 | US5230021 Audio transducer improvements |
| 07/20/1993 | US5229555 Speaker system and tv with the same |
| 07/20/1993 | US5229185 Speaker front sheet |
| 07/14/1993 | EP0550684A1 Acoustic transmitter. |
| 07/14/1993 | CN2138375Y Earphone with leading wire winding-up automatically |
| 07/13/1993 | US5228092 Voice transducer |
| 07/13/1993 | US5228090 Truck rear window speaker apparatus |
| 07/13/1993 | US5228089 Hearing aid |
| 07/13/1993 | US5228007 Ultrasonic beam forming system |
| 07/13/1993 | US5227591 Loudspeaker arrangement |
| 07/13/1993 | CA1320264C Sonar transducers |
| 07/09/1993 | WO1993014616A1 Speaker cover assembly |
| 07/09/1993 | WO1993014615A1 Speaker support frame |
| 07/09/1993 | WO1993014610A1 A tilt adjuster for a speaker support frame |
| 07/09/1993 | CA2105561A1 Tilt adjuster for a speaker support frame |
| 07/09/1993 | CA2104583A1 Speaker cover assembly |
| 07/09/1993 | CA2104367A1 Speaker support frame |
| 07/07/1993 | EP0550159A2 Loudspeaker for television set |
| 07/07/1993 | EP0520017A4 Multipurpose headwear |
| 07/07/1993 | CN2137848Y Two-epitaxy sound-guiding tube low voice box |
| 07/07/1993 | CN2137847Y Wire-less earphone with function of listening to speech by oneself |
| 07/07/1993 | CN2137846Y Metachromatic electric-level indicating device for stereo set |
| 07/06/1993 | US5226077 Headset amplifier with automatic log on/log off detection |
| 07/06/1993 | US5226076 Directional microphone assembly |
| 07/06/1993 | US5225639 Loudspeaker |
| 07/06/1993 | US5224474 Retrofitting gas mask voice amplifier unit with easily actuated switch means |
| 07/06/1993 | US5224473 Retrofitting gas mask voice amplifier unit with easily actuated switch means |
| 06/30/1993 | EP0549200A1 Electret transducer array |
| 06/30/1993 | EP0548836A1 A bass reproduction speaker apparatus |
| 06/30/1993 | CN2137416Y Health-care earplug |
| 06/30/1993 | CN2137411Y Extended phone for radiotelephone |