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经营范围
发明名称
Closed circuit alarm
摘要
申请公布号
US2279394(A)
申请公布日期
1942.04.14
申请号
US19410392561
申请日期
1941.05.08
申请人
WILLIAM FOUNTAIN
发明人
FOUNTAIN WILLIAM
分类号
G08B13/22
主分类号
G08B13/22
代理机构
代理人
主权项
地址
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