| Patent No. | Patent Title: |
| 5165017 | Automatic gain control circuit in a feed forward configuration |
| 5111506 | Power efficient hearing aid |
| 5077800 | Electronic device for processing a sound signal |
| 5073944 | Audio system for automotive vehicles |
| 5073948 | Midrange loudspeaker driver |
| 5056151 | Electrical component connection and combinations of electrical co... |
| 5048092 | Electroacoustic transducer apparatus |
| 5033092 | Stereophonic reproduction system |
| 5033090 | Hearing aid, especially of the in-the-ear type |
| 5029216 | Visual aid for the hearing impaired |
| 5027394 | Folding type telephone containing a wound electrical connection |
| 5027411 | High frequency loudspeaker |
| 5025474 | Speaker system with image projection screen |
| 5022084 | Speaker |
| 5016280 | Electronic filters, hearing aids and methods |
| 5014323 | Voice coil lead dressing |
| 5008945 | Water-proof speaker unit |
| 5003606 | Antihowling hearing aid |
| 5003608 | Apparatus and method for manipulating devices in orifices |
| 5003609 | Whole-surface driven speaker |
| 5003610 | Whole surface driven speaker |
| 5001762 | Miniature modular volume control and integrated circuit assembly ... |
| 4995085 | Hearing aid adaptable for telephone listening |
| 4993065 | Accessory communication device for telephone sets |
| 4991222 | Sound reproducer |
| 4991220 | Microphone support member |
| 4989254 | Electro-acoustic transducer and manufacturing process |
| 4987601 | Acoustic apparatus |
| 4987592 | Microphone boom assembly for communication headset |
| 4984277 | Protection element for all-in-the-ear hearing aid |
| 4984268 | Telephone handset construction |
| 4982434 | Supersonic bone conduction hearing aid and method |
| 4979219 | Piezoelectric speakers |
| 4975965 | Loudspeaker design |
| 4975967 | Earplug for noise protected communication between the user of the... |
| 4972488 | Ear wax barrier and acoustic attenuator for a hearing aid |
| 4972491 | Ear-mic headset/eardefender |
| 4972468 | Transceiver for hanging on an ear |
| 4972487 | Auditory prosthesis with datalogging capability |
| 4972492 | Earphone |
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