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公开(公告)号：US747226A
公开(公告)日：1903-12-15
申请号：US1902088588
申请日：1902-01-06
Applicant: RUMELY COMPANY M
Inventor： ROBBY WILLIAM C
CPC classification number: A01F11/04
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公开(公告)号：US816823A
公开(公告)日：1906-04-03
申请号：US1905281904
申请日：1905-10-09
Applicant: RUMELY COMPANY M
Inventor： ROBBY WILLIAM C
CPC classification number: A01F11/04
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