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发明名称
Electric annunciator
摘要
申请公布号
US1784961(A)
申请公布日期
1930.12.16
申请号
US19290370356
申请日期
1929.06.12
申请人
ENNEKING JOSEPH J
发明人
ENNEKING JOSEPH J.
分类号
A63H13/02
主分类号
A63H13/02
代理机构
代理人
主权项
地址
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