Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate
2005-03-22
2005-03-22
Tran, Sinh (Department: 2643)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Microphone capsule only
C381S191000
Reexamination Certificate
active
06870937
ABSTRACT:
An electroacoustic transducer comprises: a lower electrode; an upper electrode including an oscillation portion and a support portion for supporting the oscillation portion at least at a part of a periphery of the oscillation portion; and an insulating layer for insulating the lower electrode from the upper electrode, wherein the upper electrode has an up and down in the oscillation portion and/or in the support portion to provide a cavity between the upper electrode and the lower electrode.
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Hirosaki Yuji
Kimura Shiro
Tanaka Kiyoaki
Yamamoto Ikuo
Nixon & Vanderhye P.C.
Tran Sinh
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