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公开(公告)号:US1936652A
公开(公告)日:1933-11-28
申请号:US50837031
申请日:1931-01-12
Applicant: UNIVERSAL PRODUCTS CO INC
Inventor: YEOMANS LUCIEN I
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公开(公告)号:US1968792A
公开(公告)日:1934-07-31
申请号:US47054830
申请日:1930-07-25
Applicant: UNIVERSAL PRODUCTS CO INC
Inventor: YEOMANS LUCIEN I
IPC: B21K23/04
CPC classification number: B21K23/04
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