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发明名称
Telephone system
摘要
申请公布号
US2070874(A)
申请公布日期
1937.02.16
申请号
US19350040686
申请日期
1935.09.16
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
VOSS JOHN H.;CROCKER THOMAS 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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