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公开(公告)号：US1926431A
公开(公告)日：1933-09-12
申请号：US54295731
申请日：1931-06-08
Applicant: ERNST BUSCH AUGUST
Inventor： ERNST BUSCH AUGUST
IPC: E05F1/12
CPC classification number: E05F1/1253 , E05Y2201/672 , E05Y2800/21 , E05Y2800/244 , Y10T16/53832 , Y10T16/5386
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