Door or window guard system

Details Door or window guard system Door or window guard system

1984-08-15

1986-12-30

Kannan, Philip C.

Movable or removable closures

With specified means to effect emergency release to closure

49 56, E05B 6510

Patent

active

046318631

ABSTRACT:
A system to prevent unauthorized entry into a room through a door or a window opening. The system includes a grille hinged on one side of the opening and bar means attached at one end to the grille and extending through a port in a wall. Means are provided to hold the bar means against an inner wall to prevent opening the grille.

REFERENCES:
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patent: 3843176 (1974-10-01), Gonzalez-Cuzan
patent: 3921334 (1975-11-01), Black, Sr.
patent: 3953939 (1976-05-01), Klein
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patent: 4019281 (1977-04-01), Weiler
patent: 4055360 (1977-10-01), Russi
patent: 4057935 (1977-11-01), Rohrberg et al.
patent: 4070048 (1978-01-01), Young
patent: 4162590 (1979-07-01), Earley
patent: 4208837 (1980-06-01), Black, Sr. et al.
patent: 4263747 (1981-04-01), Coltrin et al.
patent: 4358910 (1982-11-01), Keating et al.
patent: 4400912 (1983-08-01), Wicks, Sr.

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