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| Number | Title | Issue Date |
| 5357576 | In the canal hearing aid with protruding shell portion An in-the-canal hearing aid has a shell having an inner end to be positioned in the canal adjacent the user's eardrum, and a faceplate located outwardly of the inner end but still adapted to be recessed within the ear canal in use. A protruding portion of... | 10/18/1994 |
| 5278360 | Hearing aid wax guard with integral bridge A wax guard system, for use with an in-the-ear hearing aid, has a housing secured to the hearing aid shell and an insert which screws into the housing. The insert has a body having an internal passage therethrough, and a bridge extending across the exteri... | 01/11/1994 |
| 5204917 | Modular hearing aid A modular hearing aid having separate microphone, receiver, amplifier and battery modules. The microphone module is connected to the receiver module by two dovetails. The receiver module is connected to the amplifier module by one dovetail and to a forwar... | 04/20/1993 |
| 5201008 | Modular hearing aid with lid hinged to faceplate A modular hearing aid to fit in the user's ear, having a shell, a faceplate fixed to the shell, and an electronic module removably snapped into the faceplate. The module includes an open-topped battery compartment which is closed by a lid hinged to the fa... | 04/06/1993 |
| 5084224 | Method for making hearing aid vent passage A method for producing a vent passage for an in-the-ear hearing aid shell. One or more vent holes are drilled in the shell, and a vent tubing having a copper core is laid against the shell interior wall extending through the vent holes. Electricity is pas... | 01/28/1992 |
| 5008943 | Modular hearing aid with lid hinged to faceplate A modular hearing aid to fit in the user's ear, having a shell, a faceplate fixed to the shell, and an electronic module removably snapped into the faceplate. The module includes an open-topped battery compartment which is closed by a lid hinged to the fa... | 04/16/1991 |
| 4553627 | Hearing aid wax guard A wax guard for a hearing aid is mushroom-shaped, having a cross passage through its head which intersects an axial passage in its stem. The axial passage contains an acoustic filter terminating the axial passage in its characteristic impedance. The cross... | 11/19/1985 |
| 4539439 | Plugs, receptacles and hearing aids A connecting cord has a plug at each end. Either such plug may be plugged into the receptacle of a hearing aid and the other plug may be plugged into an external microphone. The contacts of each plug are connected in a different circuit configuration to t... | 09/03/1985 |
| 4349082 | Acoustical damping element and method of forming same An acoustical damping element for acoustical tubing such as a hearing aid earpiece, in which a disc of wire screen is positioned over a disc of flexible fabric of a selected acoustic resistance, over the mouth of the tubing. An insertion tool of diameter ... | 09/14/1982 |
| 4051330 | Hearing aid having adjustable directivity A hearing aid having a two port microphone for adjustable directivity. The microphone front port is connected to a front port in the casing by a soft resilient rubber tube. The microphone rear port is connected by another soft resilient rubber tube to an ... | 09/27/1977 |
