发明名称 Apparatus and method for opening a locked door
摘要 An apparatus and method for manipulating the doorknob of a locked door. An elongated rod is inserted under the door and rotated to a vertical position. A gripper is attached to the rod and engages the doorknob as the rod is rotated. A cord is attached to the gripper, and manipulation of the rod and cord in combination turns the doorknob and opens the locked door.
申请公布号 US5123307(A) 申请公布日期 1992.06.23
申请号 US19910671437 申请日期 1991.03.19
申请人 DYER, ROBERT L. 发明人 DYER, ROBERT L.
分类号 A62B3/00;B25B33/00 主分类号 A62B3/00
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