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发明名称
Seal
摘要
申请公布号
US1798749(A)
申请公布日期
1931.03.31
申请号
US19250045442
申请日期
1925.07.22
申请人
METROPOLITAN DEVICE CORPORATION
发明人
MURRAY THOMAS E.;MURRAY JOSEPH BRADLEY;JR. THOMAS E. MURRAY,;MURRAY JOHN F.
分类号
F16J15/52
主分类号
F16J15/52
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代理人
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