| 发明名称 |
ELECTRET DEVICE AND ELECTROSTATIC OPERATING APPARATUS |
| 摘要 |
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.
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| 申请公布号 |
US2008265686(A1) |
申请公布日期 |
2008.10.30 |
| 申请号 |
US20080110013 |
申请日期 |
2008.04.25 |
| 申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
MATSUBARA NAOTERU;MURAYAMA YOSHIKI;SHISHIDA YOSHINORI;HIRANO HITOSHI |
| 分类号 |
G11C13/02 |
主分类号 |
G11C13/02 |
| 代理机构 |
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代理人 |
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| 主权项 |
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