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发明名称
Dial system
摘要
申请公布号
US1994321(A)
申请公布日期
1935.03.12
申请号
US19340722215
申请日期
1934.04.24
申请人
GENERAL ELECTRIC COMPANY
发明人
NORTON CHARLES T.
分类号
H03J1/08
主分类号
H03J1/08
代理机构
代理人
主权项
地址
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