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经营范围
发明名称
Rhythm selector
摘要
申请公布号
US2524736(A)
申请公布日期
1950.10.03
申请号
US19490125197
申请日期
1949.11.03
申请人
LEONARD GREENE
发明人
RUBEN LOUIS A.
分类号
G09B15/00
主分类号
G09B15/00
代理机构
代理人
主权项
地址
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