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经营范围
发明名称
SOUND BOARD
摘要
申请公布号
CA338951(A)
申请公布日期
1934.01.30
申请号
CAD338951
申请日期
申请人
FRANK M. BEST
发明人
FRANK M. BEST
分类号
主分类号
代理机构
代理人
主权项
地址
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