Door closer

Details Door closer Door closer

1983-09-26

1985-12-17

Bullock, B. J.

Tools and hardware

Locking or closing device

Patent

active

D02817624

REFERENCES:
patent: D271277 (1983-11-01), Okazaki
patent: 2994906 (1961-08-01), Check et al.
patent: 3188682 (1965-06-01), Check et al.
patent: 3787924 (1973-01-01), Jentsch
patent: 3877108 (1975-04-01), Del Fiacco
patent: 4086681 (1978-05-01), Nakanishi

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