Safety chain lock for a door or similar structure

Details Safety chain lock for a door or similar structure Safety chain lock for a door or similar structure

1982-06-07

1984-06-05

Burke, Wallace R.

Tools and hardware

Locking or closing device

Lock, latch or bolt

D 8340

Patent

active

D02741253

REFERENCES:
patent: D221375 (1971-08-01), Saito
patent: D223228 (1972-04-01), Padleckas
patent: D226944 (1973-05-01), Bobrowski
patent: D227410 (1973-06-01), Yip
patent: D229163 (1973-11-01), Bobrowski
patent: D234452 (1975-03-01), Saito
patent: 1472206 (1923-10-01), Buekle
patent: 3950019 (1976-04-01), Dugan
patent: 3999408 (1976-12-01), Kawakami
patent: 4027908 (1977-06-01), Crepinsek
patent: 4105231 (1978-08-01), Huyssen
Home Furnishing Daily, 3/28/62, p. 18, Security Hardware Co., "Chain Dor-Loc", ad display.

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