Attachment for turning door knobs

Details Attachment for turning door knobs Attachment for turning door knobs

1988-09-19

1991-10-22

Feifer, Melvin B.

Tools and hardware

Handle, knob or pull

Element or attachment

Patent

active

D03209237

REFERENCES:
patent: D295605 (1988-05-01), Leopoldi
patent: 2801122 (1957-07-01), Sutter
patent: 3960396 (1976-06-01), Miyahara
patent: 4223931 (1980-09-01), Neary
patent: 4285536 (1981-08-01), McCoy et al.
patent: 4397489 (1983-08-01), Lind
patent: 4504087 (1985-03-01), Pennington
patent: 4783883 (1988-11-01), Szalay

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