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公开(公告)号:US2864092A
公开(公告)日:1958-12-16
申请号:US57582956
申请日:1956-04-03
Applicant: GEORGE HURST
Inventor: GEORGE HURST
IPC: A42B1/20
CPC classification number: A42B1/201
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公开(公告)号:US2125231A
公开(公告)日:1938-07-26
申请号:US18043537
申请日:1937-12-17
Applicant: GEORGE HURST
Inventor: GEORGE HURST
IPC: E21B33/12
CPC classification number: E21B33/12
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公开(公告)号:US2069494A
公开(公告)日:1937-02-02
申请号:US8409336
申请日:1936-06-08
Applicant: GEORGE HURST
Inventor: GEORGE HURST
IPC: A41H1/02
CPC classification number: A41H1/02
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