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发明名称
Signal impulse sending system
摘要
申请公布号
US2355349(A)
申请公布日期
1944.08.08
申请号
US19400341740
申请日期
1940.06.21
申请人
SIGNAL ENGINEERING & MANUFACTURING COMPANY
发明人
WHEELOCK JOHN H.;CYPSER HUGO F.
分类号
H04M11/02
主分类号
H04M11/02
代理机构
代理人
主权项
地址
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