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发明名称
FIREPROOF ELECTRICAL ISOLATION SPEAKER
摘要
申请公布号
US3573395(A)
申请公布日期
1971.04.06
申请号
USD3573395
申请日期
1968.07.10
申请人
HENRY B. WHITMORE
发明人
HENRY B. WHITMORE
分类号
H04R1/02;H04R1/08;(IPC1-7):H04R13/02
主分类号
H04R1/02
代理机构
代理人
主权项
地址
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