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经营范围
发明名称
Pitch pipes
摘要
申请公布号
US2871748(A)
申请公布日期
1959.02.03
申请号
US19540447013
申请日期
1954.08.02
申请人
WILLIAM KRATT
发明人
KRATT WILLIAM
分类号
G10G7/02
主分类号
G10G7/02
代理机构
代理人
主权项
地址
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