Anti-theft "O" tool and screw set for license plates

Details Anti-theft "O" tool and screw set for license plates Anti-theft "O" tool and screw set for license plates

1997-11-04

1999-02-16

Morgan, Eileen P.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81460, 411910, B25B 1348

Patent

active

058709347

ABSTRACT:
A theft prevention system is disclosed wherein modified screw heads can be removed by only a specially configured tool. The screw heads have a central polygon groove with at least two grooves projecting outward from the polygon. The screw removal tool is adapted to mate with the polygon groove and the projecting grooves to accomplish removal and tightening of the screw.

REFERENCES:
patent: 755804 (1904-12-01), Smith
patent: 2140449 (1938-12-01), Brown
patent: 2173707 (1939-09-01), Brown
patent: 3236275 (1966-02-01), Smith
patent: 3369441 (1968-02-01), Kosar
patent: 3675694 (1972-07-01), Barlow
patent: 3892031 (1975-07-01), Bisbing
patent: 5097686 (1992-03-01), Plumer
patent: 5214987 (1993-06-01), Fenton, Sr.
patent: 5353667 (1994-10-01), Wilner
patent: 5528966 (1996-06-01), Coppejans
patent: 5674037 (1997-10-01), Lu

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