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公开(公告)号：US2077659A
公开(公告)日：1937-04-20
申请号：US6315336
申请日：1936-02-10
Applicant: RICHMOND FIREPROOF DOOR COMPAN
Inventor： BANCROFT JAMES E
IPC: B66B13/12
CPC classification number: B66B13/12
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公开(公告)号：US2006082A
公开(公告)日：1935-06-25
申请号：US74020734
申请日：1934-08-17
Applicant: RICHMOND FIREPROOF DOOR COMPAN
Inventor： BANCROFT JAMES E
IPC: E05F15/16
CPC classification number: E05F15/665
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