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经营范围
发明名称
Amplifier
摘要
An accessory for mounting on the receiver of a personal paging system. The receiver is normally worn below ear level and the accessory increases the sound of the paging signals reaching ear level.
申请公布号
US4525872(A)
申请公布日期
1985.06.25
申请号
US19830508012
申请日期
1983.06.27
申请人
ZOCHOWSKI, JOHN S.
发明人
ZOCHOWSKI, JOHN S.
分类号
G08B3/10;H04R1/22;(IPC1-7):H04B1/08
主分类号
G08B3/10
代理机构
代理人
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地址
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