Deadbolt security system

Details Deadbolt security system Deadbolt security system

2006-12-05

2006-12-05

Glessner, Brian E. (Department: 3676)

Closure fasteners

Portable

C292SDIG020

Reexamination Certificate

active

07144052

ABSTRACT:
This is a device, which will be inserted over the doorknob and behind a dead bolt. It will prevent a dead bolt from turning in the event that someone with a key tries to enter the home or business while the space is being occupied.

REFERENCES:
patent: 3933014 (1976-01-01), Moses
patent: 4279137 (1981-07-01), Cook
patent: 4715200 (1987-12-01), Katsaros
patent: 4885921 (1989-12-01), Sharav
patent: 5052202 (1991-10-01), Murphy
patent: 5193373 (1993-03-01), Hunt
patent: D334703 (1993-04-01), Murphy
patent: D397025 (1998-08-01), Kosi
patent: 6993944 (2006-02-01), Hicks

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