c. 1836
E. Robinson & Co.
1836 US98 Patent Knobs with Sulfide
1837
E. Robinson & Co.
E. & G.W. Robinson Patent Model
c. 1840s
E. Robinson & Co.
Mercury Glass Knob
c. 1883
Wm. Hall & Co.
William F. Hall Patent Knob
c. 1890
The John Tein Co.
Blue Glass Door Knob
c. 1950s
The W.C. Vaughan Co.
1179 Ebony and Lucite Knobs
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