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Ruler.

Description: Patent for a new and improved ruler. This design consists in "the combination of the flexible top piece or strip having parallel longitudinal ruling-edges and the separate tapering feet secured to the underside of said strip at suitable distances apart throughout the length of the latter, and with the ruling-edges of the top strip overlapping them" (lines 43-50).
Date: February 11, 1890
Creator: Matthews, Oscar S.
Partner: UNT Libraries Government Documents Department

Gas-Generator.

Description: Patent for an apparatus for generating gas from light hydrocarbons. Includes instructions and illustrations.
Date: February 11, 1896
Creator: Vestal, William B. & Ray, Samuel W.
Partner: UNT Libraries Government Documents Department

Automatic Railway-Switch

Description: Patent for an improved automatic railway switch based on an earlier model made by the same person. Illustrations included.
Date: February 11, 1908
Creator: McGee, Richard M. & Jones, William M.
Partner: UNT Libraries Government Documents Department

Building-Slab

Description: Patent for new invention that would improve in the construction of upright walls.
Date: February 11, 1920
Creator: Hanszen, Oscar A.
Partner: UNT Libraries Government Documents Department

Clothes-Pin.

Description: Patent for metallic clothes pins made from a single length of wire.
Date: February 11, 1919
Creator: Atkins, Irving J.
Partner: UNT Libraries Government Documents Department
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