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公开(公告)号：US1813263A
公开(公告)日：1931-07-07
申请号：US38269729
申请日：1929-08-01
Applicant: TODD JAMES H , WHEELER GEORGE F
Inventor： TODD JAMES H , WHEELER GEORGE F
CPC classification number: B63B35/50
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公开(公告)号：US1889391A
公开(公告)日：1932-11-29
申请号：US55533731
申请日：1931-08-05
Applicant: TODD JAMES H
Inventor： TODD JAMES H
IPC: A01D34/86
CPC classification number: A01D34/86
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