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经营范围
发明名称
Dictating machine
摘要
申请公布号
US3222074(A)
申请公布日期
1965.12.07
申请号
US19630253133
申请日期
1963.01.22
申请人
MCGRAW-EDISON COMPANY
发明人
WALKER RICHARD K.
分类号
G11B25/06
主分类号
G11B25/06
代理机构
代理人
主权项
地址
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