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发明名称
Operating mechanism for automatic telephones
摘要
申请公布号
US1859622(A)
申请公布日期
1932.05.24
申请号
US19300431023
申请日期
1930.02.24
申请人
HUBERT FITCH WILLIAM
发明人
FITCH WILLIAM HUBERT
分类号
H04M1/23
主分类号
H04M1/23
代理机构
代理人
主权项
地址
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