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发明名称
Light-coloring screen
摘要
申请公布号
US1754896(A)
申请公布日期
1930.04.15
申请号
US19270231406
申请日期
1927.11.07
申请人
KNAUBER ALEXANDER M
发明人
KNAUBER ALEXANDER M.
分类号
A63J5/02;A63J15/00
主分类号
A63J5/02
代理机构
代理人
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