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发明名称
METHOD OF MANUFACTURE OF ELECTRET MEMBRANES FOR ELECTROACOUSTIC TRANSDUCERS
摘要
申请公布号
PL139195(B1)
申请公布日期
1986.12.31
申请号
PL19820234822
申请日期
1982.01.22
申请人
发明人
分类号
H04R;H04R7/16;(IPC1-7):H04R7/16
主分类号
H04R
代理机构
代理人
主权项
地址
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