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发明名称
Electric switch
摘要
申请公布号
US1889334(A)
申请公布日期
1932.11.29
申请号
US19290349761
申请日期
1929.03.25
申请人
KUHN FRANK O
发明人
KUHN FRANK O.
分类号
G04F3/02
主分类号
G04F3/02
代理机构
代理人
主权项
地址
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