Doorknob

Details Doorknob Doorknob

1998-12-10

1999-11-02

Bullock, B. J.

Tools and hardware

Handle, knob or pull

Simulative

D8310, D11107, 0806

Patent

active

D04159470

REFERENCES:
patent: D53868 (1919-09-01), Stump
patent: D137133 (1944-01-01), Hoover
patent: D145236 (1946-07-01), Sutherlin
patent: D231315 (1974-04-01), James
Texas A&M University Collegiate Licensing Art, undated.
The Texas Aggie, Cover Page, Oct. 1989, vol. 70, No. 6.

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