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发明名称
Safety device for suspended doors
摘要
申请公布号
US1863961(A)
申请公布日期
1932.06.21
申请号
US19310535844
申请日期
1931.05.08
申请人
RICHMOND FIREPROOF DOOR COMPANY
发明人
BALL HALLECK C.;JACKSON CLAYTON R.;KELLER WALTER B.;WINDER JOSEPH Z.
分类号
E05D13/00
主分类号
E05D13/00
代理机构
代理人
主权项
地址
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