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公开(公告)号:US3504514A
公开(公告)日:1970-04-07
申请号:US3504514D
申请日:1967-09-20
Applicant: MADISON IND INC
Inventor: KORSON LEONARD J
CPC classification number: B24B39/045 , Y10T29/47
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公开(公告)号:US3199379A
公开(公告)日:1965-08-10
申请号:US25868563
申请日:1963-02-15
Applicant: MADISON IND INC
Inventor: KORSON LEONARD J
IPC: B23B51/04
CPC classification number: B23B51/0466 , B23B2251/201 , B23B2251/50 , B23B2251/56
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