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发明名称
Sine bar
摘要
申请公布号
US2417150(A)
申请公布日期
1947.03.11
申请号
US19450590244
申请日期
1945.04.25
申请人
BERRY ERNEST A
发明人
BERRY ERNEST A.
分类号
主分类号
代理机构
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地址
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