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发明名称
Clock for alarm systems
摘要
申请公布号
US1818958(A)
申请公布日期
1931.08.11
申请号
US19260105786
申请日期
1926.04.30
申请人
THE DOUBLE-A ALARM COMPANY
发明人
CHAPMAN ARTHUR B.
分类号
G04C23/16
主分类号
G04C23/16
代理机构
代理人
主权项
地址
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