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摘要
申请公布号
US1888406(A)
申请公布日期
1932.11.22
申请号
US19320537315
申请日期
1932.01.16
申请人
VIKING MANUFACTURING COMPANY, INC.
发明人
PAYBERG ANDREW
分类号
G09F13/06
主分类号
G09F13/06
代理机构
代理人
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