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经营范围
发明名称
MULTILEVEL CODE SIGNAL TRANSMISSION SYSTEM
摘要
申请公布号
US3521274(A)
申请公布日期
1970.07.21
申请号
USD3521274
申请日期
1967.12.20
申请人
NIPPON DENKI KK.
发明人
AKIRA SAWAI
分类号
H04L25/48;H04L25/49;(IPC1-7):G08C19/28;H04L3/00
主分类号
H04L25/48
代理机构
代理人
主权项
地址
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