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公开(公告)号:US2335594A
公开(公告)日:1943-11-30
申请号:US40629741
申请日:1941-08-11
Applicant: FMC CORP
Inventor: KERR CHARLES E
IPC: A01F11/06
CPC classification number: A01F11/06
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公开(公告)号:US2325859A
公开(公告)日:1943-08-03
申请号:US34669440
申请日:1940-07-22
Applicant: FMC CORP
Inventor: KERR CHARLES E
IPC: A01F11/06
CPC classification number: A01F11/06
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公开(公告)号:US2177988A
公开(公告)日:1939-10-31
申请号:US16699037
申请日:1937-10-02
Applicant: FMC CORP
Inventor: KERR CHARLES E
IPC: A01F11/06
CPC classification number: A01F11/06 , Y10T83/6563 , Y10T83/6633
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