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经营范围
发明名称
Pole-changer transmitter
摘要
申请公布号
US1743494(A)
申请公布日期
1930.01.14
申请号
US19270225755
申请日期
1927.10.12
申请人
SNYDER JOSEPH W
发明人
SNYDER JOSEPH W.
分类号
H01H51/22
主分类号
H01H51/22
代理机构
代理人
主权项
地址
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