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公开(公告)号:US1997969A
公开(公告)日:1935-04-16
申请号:US65060533
申请日:1933-01-07
Applicant: KELLOGG M W CO
Inventor: HOPKINS ROBERT K
IPC: B23K33/00
CPC classification number: B23K33/004
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公开(公告)号:US1901516A
公开(公告)日:1933-03-14
申请号:US40704129
申请日:1929-11-14
Applicant: KELLOGG M W CO
Inventor: HOPKINS ROBERT K
IPC: B21C37/20
CPC classification number: B21C37/207
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