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发明名称
Signalling arrangement for telecommunication systems
摘要
申请公布号
US2832834(A)
申请公布日期
1958.04.29
申请号
US19520291613
申请日期
1952.06.04
申请人
DE STAAT DER NEDERLANDEN, TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEUR-GENERAAL DER POSTERIJEN
发明人
OBERMAN ROELOF M. M.
分类号
H04Q1/18
主分类号
H04Q1/18
代理机构
代理人
主权项
地址
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