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Combination-Wrench.

Description: Patent for a combination wrench that combines a sliding-jaw wrench with a tallow box, hammer, nail claw, horseshoe-pick, plow-paddle, and screwdriver.
Date: December 1, 1885
Creator: McKenzie, Winfield S.
Partner: UNT Libraries Government Documents Department

Adjustable Book Support.

Description: Patent for a new and improved book rest. This design consists "of an upright pivoted in a support or base, a sliding lower supporting cross-bar, an upper sliding supporting-bar, both bars having sockets upon their rear sides sliding upon the upright and provided with set-screws, and leaf-clamps consisting of a piece of spring doubled at one end to form slides sliding upon the arms of the upper cross-bar, forming curved yielding portions, forming transverse eyes at the other ends, having flat bl… more
Date: November 25, 1884
Creator: Johnson, William Oscar
Partner: UNT Libraries Government Documents Department

Controlling Mechanism for Exhaust-Gases of Internal-Combustion Engines.

Description: Patent for an improved controlling mechanism for accelerating the warming up of engines, especially automotive and marine engines. It can maintain a good working temperature while running at slow speeds so that the engine may operate economically in cold weather.
Date: January 29, 1920
Creator: Guthrie, William S.
Partner: UNT Libraries Government Documents Department
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