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经营范围
发明名称
Alarm for deaf persons
摘要
申请公布号
US2580598(A)
申请公布日期
1952.01.01
申请号
US19510207351
申请日期
1951.01.23
申请人
PASQUALE RODY
发明人
RODY PASQUALE
分类号
G04B23/02
主分类号
G04B23/02
代理机构
代理人
主权项
地址
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