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发明名称
SECOND ORDER TOROIDAL MICROPHONE
摘要
申请公布号
EP0186388(B1)
申请公布日期
1992.03.04
申请号
EP19850309032
申请日期
1985.12.12
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
SESSLER, GERHARD MARTIN;WEST, JAMES EDWARD
分类号
H04R1/40;H04R3/00
主分类号
H04R1/40
代理机构
代理人
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地址
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