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发明名称
Light pencil
摘要
申请公布号
US1875048(A)
申请公布日期
1932.08.30
申请号
US19300502019
申请日期
1930.12.13
申请人
MASSACHUSETTS MEMORIAL HOSPITALS
发明人
LEVENE GEORGE
分类号
G03B17/24
主分类号
G03B17/24
代理机构
代理人
主权项
地址
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