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公开(公告)号：US964601A
公开(公告)日：1910-07-19
申请号：US1909534930
申请日：1909-12-27
Applicant: AKERSON ERNEST A
Inventor： AKERSON ERNEST A
CPC classification number: B60B39/12
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公开(公告)号：US1950075A
公开(公告)日：1934-03-06
申请号：US57455631
申请日：1931-11-12
Applicant: AKERSON ERNEST A
Inventor： AKERSON ERNEST A
IPC: A01K85/16
CPC classification number: A01K85/16
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