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发明名称
Telephone system
摘要
申请公布号
US1786410(A)
申请公布日期
1930.12.23
申请号
US19270215793
申请日期
1927.08.27
申请人
RESERVE HOLDING COMPANY
发明人
STEHLIK RUDOLPH F.
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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