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公开(公告)号：US1863961A
公开(公告)日：1932-06-21
申请号：US53584431
申请日：1931-05-08
Applicant: RICHMOND FIREPROOF DOOR COMPAN
Inventor： BALL HALLECK C , JACKSON CLAYTON R , KELLER WALTER B , WINDER JOSEPH Z
IPC: E05D13/00
CPC classification number: E05D13/003 , E05Y2201/618 , E05Y2900/106 , Y10S16/31
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