Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate
2011-08-02
2011-08-02
Ni, Suhan (Department: 2614)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
C381S322000, C381S324000
Reexamination Certificate
active
07991174
ABSTRACT:
Embodiments of the invention provide a barrier for protecting hearing aid metal-air battery assemblies from exposure to liquids causing obstruction of a battery air vent. One embodiment provides a barrier configured to be attached to a CIC hearing aid battery having a vent. The barrier has an oxygen permeability configured to allow the diffusion of sufficient oxygen for a battery to meet the power demands of a hearing aid operating in the bony portion of the ear canal over an extended time period. The barrier has a physical property configured to substantially prevent liquid obstruction of at least a portion of the vent on a metal-air battery such as a zinc-air battery. The physical property can be at least one of a hydrophobicity, oleophobocity or surface energy. The barrier can be directly attached to the battery or indirectly via a holder and can encase substantially the entire battery.
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patent: 2004/0140114 (2004-07-01), Wagner
Ballachanda, “Cerumen and the Ear Canal Secretory System”,The Human Ear Canal, Singular Publishing, 1995, p. 195.
Gable Richard
Huynh Timothy C.
Huynh, legal representative Sharon
Ram Sunder
Henricks Slavin & Holmes LLP
InSound Medical, Inc.
Ni Suhan
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