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Primary view of Ruler.
Matthews, Oscar S.
February 11, 1890
Primary view of Gas-Generator.
Vestal, William B. & Ray, Samuel W.
February 11, 1896
Primary view of Automatic Railway-Switch
McGee, Richard M. & Jones, William M.
February 11, 1908
Primary view of Building-Slab
Hanszen, Oscar A.
February 11, 1920
Primary view of Clothes-Pin.
Atkins, Irving J.
February 11, 1919
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