发明授权
- 专利标题: Doorbar system
- 专利标题(中): 门栏系统
-
申请号: US579479申请日: 1975-05-21
-
公开(公告)号: US3980328A公开(公告)日: 1976-09-14
- 发明人: Ernest A. Pearson
- 申请人: Ernest A. Pearson
- 申请人地址: MI Clarkston
- 专利权人: Pearson; Robert J.
- 当前专利权人: Pearson; Robert J.
- 当前专利权人地址: MI Clarkston
- 主分类号: E05C19/00
- IPC分类号: E05C19/00 ; E05B13/00 ; E05C13/02 ; E05C19/18
摘要:
Improvement in a doorbar device for barring the door of a doorway, the doorway having doorjambs and a door therefor, the door having a doorknob, the doorbar device comprising a doorknob constructed to be affixed to the doorjambs of the doorway to extend across and bar the door from being opened, the doorbar device also comprising a mechanism for applying a force upon the doorknob to prevent turning thereof.
公开/授权文献
- US5613888A Fisherman's marker 公开/授权日:1997-03-25
信息查询