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发明名称
Side wall tester
摘要
申请公布号
US2760580(A)
申请公布日期
1956.08.28
申请号
US19540409878
申请日期
1954.02.12
申请人
MADGE JOHNSTON;EDGAR C. JOHNSTON, JR.;GORDON C. JOHNSTON;JOSEPH GLENN JOHNSTON;MORDICA O. JOHNSTON, JR.;WARREN C. JOHNSTON
发明人
JOHNSTON MORDICA O.
分类号
E21B49/08
主分类号
E21B49/08
代理机构
代理人
主权项
地址
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