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发明名称
Intercommunication system
摘要
申请公布号
US2238263(A)
申请公布日期
1941.04.15
申请号
US19390285863
申请日期
1939.07.22
申请人
C. LORENZ AKTIENGESELLSCHAFT
发明人
HELMERT ROBERT
分类号
H04L12/00;H04Q1/45
主分类号
H04L12/00
代理机构
代理人
主权项
地址
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