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发明名称
Telephone exchange systems
摘要
申请公布号
US3229040(A)
申请公布日期
1966.01.11
申请号
US19620173952
申请日期
1962.02.19
申请人
ASSOCIATED ELECTRICAL INDUSTRIES LIMITED
发明人
DRAKE BERNARD;SMITH SYDNEY FRANCIS
分类号
H01H1/60;H04Q3/00
主分类号
H01H1/60
代理机构
代理人
主权项
地址
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