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公开(公告)号：US1434629A
公开(公告)日：1922-11-07
申请号：US51102721
申请日：1921-10-28
Applicant: PETZOLD FERDINAND P
Inventor： PETZOLD FERDINAND P
IPC: B23D61/06
CPC classification number: B23D61/06 , Y10T83/9343
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公开(公告)号：US1120969A
公开(公告)日：1914-12-15
申请号：US1914812654
申请日：1914-01-17
Applicant: PETZOLD FERDINAND P
Inventor： PETZOLD FERDINAND P
CPC classification number: B23D61/06 , Y10T83/9343
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