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发明名称
Elevator latch
摘要
申请公布号
US2148762(A)
申请公布日期
1939.02.28
申请号
US19380183301
申请日期
1938.01.04
申请人
BYRON JACKSON CO.
发明人
LUNDEEN CHESTER ALBERT
分类号
E21B19/06
主分类号
E21B19/06
代理机构
代理人
主权项
地址
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