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发明名称
Automatic telephone system
摘要
申请公布号
US1805726(A)
申请公布日期
1931.05.19
申请号
US19290361311
申请日期
1929.05.08
申请人
RESERVE HOLDING COMPANY
发明人
SAUNDERS NORMAN H.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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