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公开(公告)号:US1654463A
公开(公告)日:1927-12-27
申请号:US16512727
申请日:1927-02-01
Applicant: JAQUES GEORGE H
Inventor: JAQUES GEORGE H
CPC classification number: F16L19/08 , E21B33/0422 , Y10T403/4958
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公开(公告)号:US1604581A
公开(公告)日:1926-10-26
申请号:US5862525
申请日:1925-09-25
Applicant: JAQUES GEORGE H
Inventor: JAQUES GEORGE H
IPC: E21B33/04
CPC classification number: E21B33/04
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公开(公告)号:US1604580A
公开(公告)日:1926-10-26
申请号:US5862425
申请日:1925-09-25
Applicant: JAQUES GEORGE H
Inventor: JAQUES GEORGE H
IPC: E21B33/04
CPC classification number: E21B33/0422 , Y10T24/44598
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