Electret device and electrostatic operating apparatus

Details Electret device and electrostatic operating apparatus Electret device and electrostatic operating apparatus

2008-04-25

2010-11-02

Deberadinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Electrets

Reexamination Certificate

active

07825547

ABSTRACT:
An electret device includes an electret film capable of storing charges and a protective film formed so as to substantially surround a side end surface of the electret film.

REFERENCES:
patent: 3812575 (1974-05-01), Hedman
patent: 4513049 (1985-04-01), Yamasaki et al.
patent: 2007/0230722 (2007-10-01), Mori et al.
patent: 2003-163996 (2003-06-01), None

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