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发明名称
Rotary sheet music holder
摘要
申请公布号
US2792666(A)
申请公布日期
1957.05.21
申请号
US19560584928
申请日期
1956.05.15
申请人
GREEN HENRY A
发明人
GREEN HENRY A.
分类号
A47B23/00
主分类号
A47B23/00
代理机构
代理人
主权项
地址
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