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发明名称
Movable rest rail for piano action abstracts
摘要
申请公布号
US2260348(A)
申请公布日期
1941.10.28
申请号
US19400358497
申请日期
1940.09.26
申请人
PRATT, READ & CO., INC.
发明人
STEIN CHARLES FREDERICK
分类号
G10C3/16
主分类号
G10C3/16
代理机构
代理人
主权项
地址
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