Hearing aid device
Patent 5343532 Issued on August 30, 1994. Estimated Expiration Date: 
March 9, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 9, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2485405 3209081 3894195 Hearing aid with dual pickup Wireless transmitting and receiving systems including ear microphones Transmitter/receiver teaching apparatus N-Aminoalkylenesulfonamido substituted monoazo colorants Molded hearing aid and battery charger Portable communication apparatus In-canal hearing aid InventorApplicationNo. 848320 filed on 03/09/1992US Classes:381/315, Remote control, wireless, or alarm381/328Ear insertExaminersPrimary: Kuntz, CurtisAssistant: Tran, Sinh Foreign Patent References
International ClassH04R 025/00AbstractA device is designed to provide persons with a mild, moderate, severe or profound hearing loss the ability to hear sound that would be inaudible, as well as the ability to hear ambient environmental noise. The device is fabricated as: (1) a receiver assembly having a pliable flexible strip worn in the outer ear with a small transducer which extends into the auditory canal, and (2) a transmitter assembly having a microphone located remotely on the person whereby information is transmitted to the receiver assembly via modulated carrier waves. The need for a battery in the receiver assembly is eliminated as the power supply is driven by magnetic induction from the transmitter assembly positioned a few inches away, as in a neck pendant.Other References
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