| Patents for H04R 25 - Deaf-aid sets (22,418) |
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| 02/25/1992 | US5091952 Feedback suppression in digital signal processing hearing aids |
| 02/25/1992 | CA1296418C Microphone with frequency pre-emphasis |
| 02/25/1992 | CA1296417C Hearing aid comprising a printed circuit board and hearing coil |
| 02/21/1992 | WO1992003894A1 Hearing aid and method for preparing same |
| 02/18/1992 | CA1295951C Ear wax barrier for a hearing aid |
| 02/05/1992 | EP0469174A1 Method for remotely controlling a hearing aid |
| 02/04/1992 | US5086464 Telephone headset for the hearing impaired |
| 02/04/1992 | US5085628 Implantable hearing aid coupler device |
| 01/29/1992 | EP0468131A1 Memory element |
| 01/29/1992 | EP0468072A1 Hearing aid comprising an output amplifier with a limiting circuit |
| 01/28/1992 | US5084224 Method for making hearing aid vent passage |
| 01/28/1992 | CA1295044C Multi-band programmable compression system |
| 01/28/1992 | CA1294892C Variolosser |
| 01/22/1992 | EP0466961A1 Hearing aid apparatus to be worn behind the ear |
| 01/21/1992 | US5083312 Programmable multichannel hearing aid with adaptive filter |
| 01/21/1992 | US5083095 Plural source follower amplifier |
| 01/15/1992 | EP0466676A2 Hearing aid with a directive microphone having variable directivity |
| 01/14/1992 | CA1294221C Hearing aid ear piece having disposable, compressible polymeric foam sleeve |
| 01/09/1992 | DE4034096A1 Automatic on=off switching circuitry for mobile appts. - has sensor(s) responsive to movement or change and charge and discharge capacitors responsive to sensor signals |
| 01/07/1992 | CA1294032C Acoustic transducer with improved electrode spacing |
| 12/31/1991 | US5077800 Electronic device for processing a sound signal |
| 12/24/1991 | CA1293558C Hearing aid comprising printed circuit board |
| 12/18/1991 | EP0461208A1 Ergonomic hearing aid |
| 12/18/1991 | EP0461196A1 Power efficient hearing aid. |
| 12/17/1991 | CA1293204C Implantable hearing aid and method of improving hearing |
| 12/10/1991 | CA1293047C Low voltage programmable compressor |
| 12/03/1991 | US5069210 Cochlear implant employing frequency-division multiplexing and frequency modulation |
| 11/26/1991 | US5068902 Method and apparatus for reducing acoustical distortion |
| 11/26/1991 | US5068901 Dual outlet passage hearing aid transducer |
| 11/19/1991 | CA1292099C Pressure ring for ear cover |
| 11/14/1991 | DE4014872A1 Tinnitus-maskiergeraet Tinnitus masker |
| 11/12/1991 | US5063946 Measuring method, measuring apparatus and indication method of the dynamical characteristics of middle ear |
| 11/10/1991 | WO1991017638A1 Tinnitus masking device |
| 11/10/1991 | CA2076875A1 Tinnitus masking device |
| 11/06/1991 | EP0455203A2 Dual outlet passage hearing aid transducer |
| 11/02/1991 | CA2040004A1 Dual outlet passage hearing aid transducer |
| 10/30/1991 | EP0453450A1 Remote-controlled, programmable hearing aid system. |
| 10/29/1991 | US5062138 Hearing aid with battery compartment |
| 10/23/1991 | EP0453200A2 Modular hearing aid |
| 10/23/1991 | EP0389569B1 Circuit arrangement with adjustable active and/or passive components |
| 10/17/1991 | WO1991015902A1 Assistive listening device |
| 10/16/1991 | EP0451784A2 Modular hearing aid system |
| 10/15/1991 | USRE33718 Acoustic transducer with improved electrode spacing |
| 10/15/1991 | US5056204 Method of producing hearing aids |
| 10/13/1991 | CA2040224A1 Modular hearing aid system |
| 10/10/1991 | DE4011438A1 Protective cover for hearing aid - uses contoured shaped with longitudinal slot to allow operation of controls |
| 10/09/1991 | EP0450004A1 Multi-peak speech processor. |
| 10/09/1991 | EP0449860A1 Tinnitus masker. |
| 10/09/1991 | EP0449823A1 Improved variolosser |
| 10/09/1991 | EP0345345B1 Electroacoustic transducer |
| 10/08/1991 | US5056151 Electrical component connection and combinations of electrical components |
| 10/02/1991 | EP0448764A1 Programmable electrical hearing aid |
| 10/02/1991 | DE4010372A1 Hearing aid with in-ear insert - has ventilation channel with own transducer actively cancelling sound output |
| 10/01/1991 | CA1290028C Asymmetrical dual input amplifier |
| 09/26/1991 | DE4107861A1 In-ear hearing aid - has contoured end plate for utilising acoustic amplification of natural ear formation |
| 09/26/1991 | DE4008982A1 In-ear hearing aid - includes ventilation channel having rotatable blocking element for varying channel cross=section |
| 09/12/1991 | DE4107284A1 Polyurethane prods. prepn. - by reacting adduct from excess hexa:methylene di:isocyanate, tri:methyl:hexane-diol and tri:methylol-propane and butane-diol |
| 09/11/1991 | EP0446195A2 One-channel circuit for hearing aid |
| 09/11/1991 | EP0423172A4 Active noise reduction system |
| 09/10/1991 | US5048090 Hearing aid with transmitter and microphone housing parts |
| 09/10/1991 | US5047994 Supersonic bone conduction hearing aid and method |
| 09/10/1991 | US5046580 Ear plug assembly for hearing aid |
| 09/10/1991 | US5046242 Method of making feedthrough assemblies having hermetic seals between electrical feedthrough elements and ceramic carriers therefor |
| 09/10/1991 | CA1288702C Mount for a sound transducer, particularly an earphone |
| 09/05/1991 | WO1991013525A1 Earwax trap for use with hearing-aid apparatus, and hearing-aid apparatus with such a trap |
| 09/05/1991 | WO1991012783A1 Heraing assistance device comprising a self-contained direct bone conduction hearing aid implant |
| 09/03/1991 | US5046102 Hearing aid with adjustable frequency response |
| 09/03/1991 | US5045266 Process of making a hearing aid earmold in situ |
| 09/03/1991 | US5044373 Method and apparatus for fitting of a hearing aid and associated probe with distance measuring means |
| 08/21/1991 | CN2083374U Multi-purpose electronic companion |
| 08/20/1991 | US5042084 Three wire system for Cochlear implant processor |
| 08/07/1991 | EP0440572A1 Sound transmission device with selective filtering to be placed in the external ear canal and process of manufacturing thereof |
| 08/06/1991 | US5037497 Concentric electrode body; dielectric flexible substrate |
| 08/02/1991 | WO1991011160A1 Selective filtering sound transmission device for the external auditory canal |
| 08/02/1991 | CA2066441A1 Selective filtering sound transmission device for the external auditory canal |
| 08/01/1991 | DE4031132A1 Digitally programmable hearing aid - has electronic switch operated by programmable memory for selective use of programming socket as alternative source of audio input |
| 07/31/1991 | EP0435954A4 Apparatus and method for conveying amplified sound to ear |
| 07/24/1991 | EP0341292A4 Adaptive, programmable signal processing hearing aid |
| 07/23/1991 | US5033999 Method and apparatus for endodontically augmenting hearing |
| 07/17/1991 | EP0437323A2 Hearing aid |
| 07/17/1991 | EP0378579A4 Method and apparatus for treating hearing deficiencies |
| 07/16/1991 | US5033090 Hearing aid, especially of the in-the-ear type |
| 07/10/1991 | EP0435954A1 Apparatus and method for conveying amplified sound to ear. |
| 07/09/1991 | US5031219 Apparatus and method for conveying amplified sound to the ear |
| 07/02/1991 | US5029217 Transmultiplexer |
| 07/02/1991 | US5029216 Visual aid for the hearing impaired |
| 06/26/1991 | EP0433348A1 Cerumen trap for hearing aids. |
| 06/25/1991 | US5027410 Adaptive, programmable signal processing and filtering for hearing aids |
| 06/22/1991 | WO1991010243A1 Coil assemblies |
| 06/18/1991 | US5024224 Method of readout of implanted hearing aid device and apparatus therefor |
| 06/05/1991 | EP0354955A4 Improved multi-band programmable compression system |
| 05/31/1991 | WO1991008654A1 Hearing aid |
| 05/28/1991 | CA1284529C Digital hearing enhancement apparatus |
| 05/16/1991 | WO1991007067A1 High fidelity hearing aid amplifier |
| 05/14/1991 | US5016280 Electronic filters, hearing aids and methods |
| 05/14/1991 | US5015225 Implantable electromagnetic middle-ear bone-conduction hearing aid device |
| 05/14/1991 | US5015224 Partially implantable hearing aid device |
| 05/07/1991 | US5014319 Frequency transposing hearing aid |
| 05/07/1991 | US5014037 Potentiometer mounting mechanism |
| 05/07/1991 | US5014016 Switching amplifier |