| Patents for H04R 25 - Deaf-aid sets (22,418) |
|---|
| 03/23/1989 | WO1989002694A1 Method and apparatus for treating hearing deficiencies |
| 03/22/1989 | EP0308079A2 Operational amplifier stages |
| 03/22/1989 | EP0307697A1 Hearing aid and method for making it |
| 03/21/1989 | US4815140 Circuit arrangement for suppressing oscillations |
| 03/21/1989 | US4815138 In-the-ear hearing-aid with pivotable inner and outer sections |
| 03/21/1989 | US4813875 Chain extended urethane diacrylate and dental impression formation |
| 03/21/1989 | US4813419 Method and apparatus for communicating information representative of sound waves to the deaf |
| 03/21/1989 | US4813417 Signal processor for and an auditory prosthesis utilizing channel dominance |
| 03/14/1989 | CA1251274A1 Direct bone conduction hearing aid device |
| 03/07/1989 | US4811402 Method and apparatus for reducing acoustical distortion |
| 03/07/1989 | US4809712 Electrode assembly for cochlear implant |
| 03/01/1989 | EP0305213A2 Hearing aid comprising a push-pull control switch |
| 02/22/1989 | CN2033175U Cap type audiphone |
| 02/21/1989 | CA1250362A1 Class d hearing aid amplifier |
| 02/21/1989 | CA1250348A1 Adaptive noise suppressor |
| 02/15/1989 | EP0303146A2 Hearing aid |
| 02/15/1989 | EP0303143A2 Hearing aid |
| 02/07/1989 | US4803732 Hearing aid amplification method and apparatus |
| 02/07/1989 | US4803458 Control switch and potentiometer for hearing aids and the like |
| 02/02/1989 | DE3742529C1 Hearing aid |
| 02/01/1989 | EP0301649A2 Power supply control for semiconductor logic circuitry |
| 01/31/1989 | US4800982 Cleanable in-the-ear electroacoustic transducer |
| 01/31/1989 | US4800884 Magnetic induction hearing aid |
| 01/31/1989 | US4800636 Process for manufacturing an in-the-ear canal hearing aid |
| 01/31/1989 | CA1249653A1 Implantable electromagnetic middle-ear bone- conduction hearing aid device |
| 01/26/1989 | DE3723809A1 Hearing aid to be worn behind the ear |
| 01/25/1989 | CN2031591U Cushion type receiver for hearing aid |
| 01/11/1989 | EP0298323A1 Hearing aid apparatus |
| 01/03/1989 | CA1248217A1 Miniature hearing aid |
| 12/28/1988 | EP0297087A2 Hearing aid device |
| 12/20/1988 | US4792977 Hearing aid circuit |
| 12/20/1988 | US4792886 Device comprising an electronic circuit for processing an analog signal |
| 12/20/1988 | US4791819 For identifying and testing a hearing aid |
| 12/20/1988 | CA1247227A1 Auditory stimulation using cw and pulsed signals |
| 12/13/1988 | US4791673 Bone conduction audio listening device and method |
| 12/13/1988 | US4791672 Wearable digital hearing aid and method for improving hearing ability |
| 12/06/1988 | US4790019 Remote hearing aid volume control |
| 12/06/1988 | US4790018 Frequency selection circuit for hearing aids |
| 11/30/1988 | EP0292496A1 Sleep and relaxation promoting aid |
| 11/22/1988 | US4785827 Subcutaneous housing assembly |
| 11/17/1988 | WO1988009105A1 Paradoxical hearing aid |
| 11/17/1988 | EP0291325A2 Magnetic ossicular replacement prosthesis |
| 11/17/1988 | EP0291324A2 Magnet for installation in the middle ear |
| 11/15/1988 | CA1244894A1 Low voltage class b amplifier with low value decoupling capacitors |
| 11/09/1988 | EP0289750A1 Method and device for making and ear tip |
| 11/08/1988 | US4783818 Method of and means for adaptively filtering screeching noise caused by acoustic feedback |
| 11/08/1988 | US4783816 Hearing aid to be worn behind the ear having battery and volume control facing in opposite directions |
| 11/08/1988 | US4783815 Manufacturing miniature hearing aid having a multi-layer circuit arrangement |
| 11/03/1988 | DE3736591A1 Hearing aid with protection against ear wax |
| 11/02/1988 | EP0288822A1 Behind-the-ear hearing aid |
| 10/26/1988 | CN87215811U Double-earphone hearing aid |
| 10/20/1988 | WO1988008226A1 Asymmetrical dual input amplifier |
| 10/20/1988 | WO1988008224A1 Output amplifier |
| 10/19/1988 | EP0287315A2 Ear wax barriers for hearing aids |
| 10/13/1988 | DE3804526C1 Hearing aid |
| 10/12/1988 | EP0285842A1 Hearing-aid whose components are mounted in a hearing-aid casing |
| 10/11/1988 | US4776322 Implantable electromagnetic middle-ear bone-conduction hearing aid device |
| 10/04/1988 | US4774933 To enhance sound transmission |
| 09/20/1988 | US4773095 Hearing aid with locating microphones |
| 09/14/1988 | EP0282336A2 Signal processor and an auditory prosthesis utilizing channel dominance |
| 09/14/1988 | EP0282335A2 Signal processor for and an auditory prosthesis having spectral to temporal transformation |
| 09/13/1988 | US4771196 Electronically variable active analog delay line |
| 09/07/1988 | EP0281047A1 Middle ear prosthesis |
| 09/07/1988 | EP0280909A1 Circuit arrangement for the detection of oscillations |
| 09/07/1988 | EP0280907A1 Circuit arrangement for suppressing oscillations |
| 09/06/1988 | CA1241732A1 Hearing-aid, in particular behind-the ear hearing aid |
| 09/01/1988 | DE3705478A1 Electronic listening device |
| 08/31/1988 | EP0279914A2 Receiving device |
| 08/31/1988 | EP0279821A1 Cortical hearing aid |
| 08/30/1988 | CA1241428A1 Hearing aid to be worn behind the ear |
| 08/24/1988 | EP0279345A1 Device comprising an electronic circuit for analogous signal processing |
| 08/17/1988 | CN87216334U Amplitude modulation audiphone |
| 08/16/1988 | US4764957 Earpiece, telephone handset and headphone intended to correct individual hearing deficiencies |
| 08/16/1988 | US4764733 Asymmetrical dual input amplifier |
| 08/16/1988 | US4764690 Electret transducing |
| 08/16/1988 | US4763752 Mount for a sound transducer, particularly an earphone |
| 08/16/1988 | CA1240784A1 Cochlea implant |
| 08/09/1988 | US4762135 Cochlea implant |
| 08/03/1988 | CN87213813U Mini-otophone |
| 08/02/1988 | CA1240029A1 Hearing aids, signal supplying apparatus, systems for compensating hearing deficiencies, and methods |
| 08/02/1988 | CA1240028A1 Hearing aid amplification method and apparatus |
| 08/02/1988 | CA1240027A1 Hearing aid and apparatus used therein |
| 07/26/1988 | US4759798 Mixing substrate selected from monomeric, polymeric or copolymeric acrylic or methacrylic ester, hardener and jojoba oil |
| 07/25/1988 | EP0169854A4 Suspension for electro-acoustical transducers. |
| 07/19/1988 | US4759071 Automatic noise eliminator for hearing aids |
| 07/19/1988 | US4759070 Patient controlled master hearing aid |
| 07/19/1988 | US4758798 Output amplifier |
| 07/12/1988 | US4756312 Magnetic attachment device for insertion and removal of hearing aid |
| 06/22/1988 | EP0271831A2 Wound dressing membrane |
| 06/22/1988 | EP0271692A2 A miniature hearing aid having a multilayer circuit arrangement |
| 06/22/1988 | EP0271539A1 Mass production auditory canal hearing aid. |
| 06/14/1988 | US4751738 Directional hearing aid |
| 06/14/1988 | EP0226613A4 Noise supression system. |
| 06/08/1988 | EP0270268A2 Hearing aid ear piece having disposable, compressible polymeric foam sleeve |
| 06/08/1988 | EP0269680A1 Patient controlled device for ajusting a hearing aid, method, and test device for such a hearing aid. |
| 06/07/1988 | US4750207 Hearing aid noise suppression system |
| 06/01/1988 | EP0269071A2 Chain extended urethane diacrylate and dental impression formation |
| 05/26/1988 | DE3713578C1 Process for producing an individual earpiece |
| 05/24/1988 | US4747144 Amplifier with automatic inhibition of acoustic feedback |
| 05/19/1988 | WO1988003740A1 Method and apparatus for reducing acoustical distortion |