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发明名称
TELEGRAPH TRANSMITTING INSTRUMENT
摘要
申请公布号
CA303731(A)
申请公布日期
1930.09.09
申请号
CAD303731
申请日期
申请人
WILLIAM D. COOPER
发明人
WILLIAM D. COOPER
分类号
主分类号
代理机构
代理人
主权项
地址
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