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发明名称
Slide viewer and dispenser
摘要
申请公布号
US2621993(A)
申请公布日期
1952.12.16
申请号
US19500181553
申请日期
1950.08.25
申请人
MICHAEL S. WOLK
发明人
MILES JOHN R.
分类号
G03B23/04
主分类号
G03B23/04
代理机构
代理人
主权项
地址
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