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发明名称
Microphone
摘要
申请公布号
US2350010(A)
申请公布日期
1944.05.30
申请号
US19410424437
申请日期
1941.12.26
申请人
THE GLASTONBURY BANK & TRUST COMPANY
发明人
BEEKLEY FRANCIS CHEYNEY
分类号
H04R1/40
主分类号
H04R1/40
代理机构
代理人
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