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发明名称
MULTIPLEX SIGNALLING
摘要
申请公布号
CA318850(A)
申请公布日期
1932.01.12
申请号
CAD318850
申请日期
申请人
COMMUNICATION PATENTS INC.
发明人
ALEXANDER MCLEAN NICHOLSON
分类号
主分类号
代理机构
代理人
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