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发明名称
Supporting attachment for bifocal spectacles
摘要
申请公布号
US2370843(A)
申请公布日期
1945.03.06
申请号
US19420450272
申请日期
1942.07.09
申请人
CRONINGER ARTHUR G
发明人
CRONINGER ARTHUR G.
分类号
G02C5/12
主分类号
G02C5/12
代理机构
代理人
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地址
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