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公开(公告)号：US1230968A
公开(公告)日：1917-06-26
申请号：US12947216
申请日：1916-11-04
Applicant: WILBER FORD R , BALL HORACE E
Inventor： WILBER FORD R , BALL HORACE E
CPC classification number: A01K85/16
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公开(公告)号：US981454A
公开(公告)日：1911-01-10
申请号：US1910563950
申请日：1910-05-28
Applicant: MILLER ARTHUR R , BALL HORACE E
Inventor： MILLER ARTHUR R , BALL HORACE E
CPC classification number: A01K85/02
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