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公开(公告)号:US2885211A
公开(公告)日:1959-05-05
申请号:US73373658
申请日:1958-05-07
Applicant: SIMA GEORGE A
Inventor: SIMA GEORGE A
IPC: B23B31/20
CPC classification number: B23B31/202 , Y10T279/17606
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公开(公告)号:US2885210A
公开(公告)日:1959-05-05
申请号:US68944457
申请日:1957-10-10
Applicant: SIMA GEORGE A
Inventor: SIMA GEORGE A
IPC: B23B31/20
CPC classification number: B23B31/201 , Y10T279/17512 , Y10T279/1993 , Y10T279/3481
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