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发明名称
Horn
摘要
申请公布号
US1766580(A)
申请公布日期
1930.06.24
申请号
US19250021776
申请日期
1925.04.09
申请人
ASHLEY MERWIN F
发明人
ASHLEY MERWIN F.
分类号
G10K11/02
主分类号
G10K11/02
代理机构
代理人
主权项
地址
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