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发明名称
Intertoll dial switching and signaling system
摘要
申请公布号
US2935571(A)
申请公布日期
1960.05.03
申请号
US19550535832
申请日期
1955.09.22
申请人
GENERAL DYNAMICS CORPORATION
发明人
PHARIS WILLIAM W.;CAMPA FERDINAND J.;BLINN HERBERT M.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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地址
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