Control knob

Details Control knob Control knob

1989-06-19

1992-03-10

Bullock, B. J.

Tools and hardware

Handle, knob or pull

Singular point of attachment

D 8312

Patent

active

D03244792

REFERENCES:
patent: 2171361 (1939-08-01), Gits et al.
patent: 2512440 (1950-06-01), Book
patent: 2513271 (1950-07-01), Bluemink et al.
patent: 2688678 (1954-09-01), Henderson

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