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发明名称
TELEPHONIC DATA TRANSMITTING SYSTEM
摘要
申请公布号
US3618038(A)
申请公布日期
1971.11.02
申请号
USD3618038
申请日期
1969.12.24
申请人
EDWARD S. STEIN
发明人
EDWARD S. STEIN
分类号
G06F3/023;H04M11/06;H04Q1/453;(IPC1-7):H04M11/06
主分类号
G06F3/023
代理机构
代理人
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