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经营范围
发明名称
Film electret and an electret filter
摘要
申请公布号
US5256176(A)
申请公布日期
1993.10.26
申请号
US19910668042
申请日期
1991.03.12
申请人
MITSUI PETROCHEMICAL INDUSTRIES, LTD.
发明人
MATSUURA, SATOSHI;SHINAGAWA, YOSHIO
分类号
B01D39/08;B03C3/28;H01G7/02;(IPC1-7):B01D39/16;B01D53/32
主分类号
B01D39/08
代理机构
代理人
主权项
地址
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