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公开(公告)号:US2618365A
公开(公告)日:1952-11-18
申请号:US4070648
申请日:1948-07-26
Applicant: ASTRA ENGINEERING COMPANY
Inventor: SEAGREN NILS G
IPC: E05F15/04
CPC classification number: E05F15/53 , E05F3/108 , E05F15/75 , E05Y2201/21 , E05Y2201/412 , E05Y2201/424 , E05Y2900/132
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公开(公告)号:US2586442A
公开(公告)日:1952-02-19
申请号:US14771450
申请日:1950-03-04
Applicant: ASTRA ENGINEERING COMPANY
Inventor: SEAGREN NILS G
IPC: E05F15/12
CPC classification number: E05F15/611 , E05Y2900/132
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