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经营范围
发明名称
Electrical signaling
摘要
申请公布号
US1789303(A)
申请公布日期
1931.01.20
申请号
US19250017624
申请日期
1925.03.23
申请人
HENRI CHIREIX
发明人
CHIREIX HENRI
分类号
H03D7/18
主分类号
H03D7/18
代理机构
代理人
主权项
地址
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