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公开(公告)号：US1941783A
公开(公告)日：1934-01-02
申请号：US62144232
申请日：1932-07-08
Applicant: WILLIAM H ELLIS JR
Inventor： BAHR CHARLES A
IPC: B31F1/07
CPC classification number: B31F1/07 , B31F2201/0733 , B31F2201/0738 , B31F2201/0743 , B31F2201/0774 , B31F2201/0776 , B31F2201/0784
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