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摘要
申请公布号
US2815595(A)
申请公布日期
1957.12.10
申请号
US19560571952
申请日期
1956.03.16
申请人
DAVIS KENNETH M
发明人
DAVIS KENNETH M.
分类号
B42F19/00;G09F3/02;G09F3/10
主分类号
B42F19/00
代理机构
代理人
主权项
地址
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