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发明名称
Bifocal elevation attachment
摘要
申请公布号
US2512508(A)
申请公布日期
1950.06.20
申请号
US19470744553
申请日期
1947.04.29
申请人
SHEPELEVICH SAMUEL A
发明人
SHEPELEVICH SAMUEL A.
分类号
G02C5/12
主分类号
G02C5/12
代理机构
代理人
主权项
地址
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