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发明名称
Record communication-telephone system
摘要
申请公布号
US2903517(A)
申请公布日期
1959.09.08
申请号
US19550499915
申请日期
1955.04.07
申请人
THE WESTERN UNION TELEGRAPH COMPANY
发明人
RIDINGS GARVICE H.
分类号
H04N1/00;H04N1/333
主分类号
H04N1/00
代理机构
代理人
主权项
地址
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