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经营范围
发明名称
SOUND AND PICTURE TRANSMISSION
摘要
申请公布号
CA331836(A)
申请公布日期
1933.04.18
申请号
CAD331836
申请日期
申请人
THE CANADIAN GENERAL ELECTRIC COMPANY
发明人
LOWELL J. HARTLEY
分类号
主分类号
代理机构
代理人
主权项
地址
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