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发明名称
Impulse-sender
摘要
申请公布号
US2603718(A)
申请公布日期
1952.07.15
申请号
US19500139558
申请日期
1950.01.20
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
LOVELL CLARENCE A.;PARKINSON DAVID B.
分类号
H04M1/272
主分类号
H04M1/272
代理机构
代理人
主权项
地址
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