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发明名称
Telephone system
摘要
申请公布号
US1951109(A)
申请公布日期
1934.03.13
申请号
US19310577967
申请日期
1931.11.30
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
RICHARDSON RODNEY G.
分类号
H04M7/10;H04Q3/00
主分类号
H04M7/10
代理机构
代理人
主权项
地址
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