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经营范围
发明名称
SIGNAL TRANSMISSION REGULATOR
摘要
申请公布号
CA412478(A)
申请公布日期
1943.05.11
申请号
CAD412478
申请日期
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED;BELL TELEPHONE LABORATORIES
发明人
ROY WILLIAM CHESNUT
分类号
主分类号
代理机构
代理人
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