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公开(公告)号:US996494A
公开(公告)日:1911-06-27
申请号:US1910582576
申请日:1910-09-17
Applicant: LOVELL FREDERIC DAVID
Inventor: LOVELL FREDERIC DAVID
CPC classification number: D01B1/10
公开(公告)号:US996494A
公开(公告)日:1911-06-27
申请号:US1910582576
申请日:1910-09-17
Applicant: LOVELL FREDERIC DAVID
Inventor: LOVELL FREDERIC DAVID
CPC classification number: D01B1/10