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发明名称
Optical recording device for telegraphic signaling
摘要
申请公布号
US1785610(A)
申请公布日期
1930.12.16
申请号
US19280322841
申请日期
1928.11.30
申请人
EDOUARD BELIN
发明人
BELIN EDOUARD
分类号
H04L13/18
主分类号
H04L13/18
代理机构
代理人
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地址
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