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公开(公告)号:CA597141A
公开(公告)日:1960-05-03
申请号:CA597141D
Applicant: STRATTON LLOYD O
Inventor: STRATTON LLOYD O
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公开(公告)号:US2754066A
公开(公告)日:1956-07-10
申请号:US49460355
申请日:1955-03-16
Applicant: STRATTON LLOYD O
Inventor: STRATTON LLOYD O
IPC: E01B13/02
CPC classification number: E01B13/02 , E01B2201/02 , E01B2201/08
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公开(公告)号:US2416241A
公开(公告)日:1947-02-18
申请号:US55327344
申请日:1944-09-08
Applicant: STRATTON LLOYD O
Inventor: STRATTON LLOYD O
IPC: E01B27/04
CPC classification number: E01B27/04
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