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发明名称
POLYCARBONATE ELECTRETS
摘要
申请公布号
CA783825(A)
申请公布日期
1968.04.23
申请号
CAD783825
申请日期
申请人
NORTHERN ELECTRIC COMPANY LIMITED
发明人
MARTIN M. PERLMAN;CORNELIS W. REEDYK
分类号
主分类号
代理机构
代理人
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