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发明名称
Telephone system
摘要
申请公布号
US2104449(A)
申请公布日期
1938.01.04
申请号
US19360095530
申请日期
1936.08.12
申请人
GRACE MACDONALD STOKELY;BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BOWNE LANGFORD J.;BEACH HOWARD;LAMBERTY FREDERICK R.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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