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Trombone.

Description: Patent, including illustration, for "a musical instrument slide and is more particularly designated as a bearing or stocking for a trombone or other similar instruments in which it is desirable to provide a smooth bearing for the slidable part of the instrument" (page 1, lines 9-13).
Date: February 17, 1920
Creator: Ackley, William D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Photographic Copying Apparatus

Description: Patent for a simple and effective photographic-copying apparatus capable of making copies of small objects of different sizes. The machine is for general commercial use "that may be successfully operated by persons not particularly skilled in the photographic art" (lines 23-25) including illustrations.
Date: February 2, 1915
Creator: Gregory, Oscar T. & Carkhuff, Norman W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Electromagnetic Ore-Separator.

Description: Patent for an electromagnetic ore separator, which reduces the risk of any valuable particles falling with the waste mineral material below the magnetic surface.
Date: February 16, 1909
Creator: Charlton, Thomas
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

[Letter from E. S. Marsh to I. H. Kempner, February 19, 1963]

Description: Letter from E. S. Marsh to I. H. Kempner acknowledging Kempner’s concerns regarding the railway's organizational changes and their potential impact on Galveston. He conveys regret for any associated personal or community distress, stressing the decision's inevitability due to changing times. He remains hopeful that the impact on Galveston will be minimal and temporary, expressing confidence in the city’s future growth and prosperity.
Date: February 19, 1963
Creator: Marsh, E. S.
Item Type: Refine your search to only Letter
Partner: Rosenberg Library

Bottle-Stopper.

Description: Patent for "a bottle-stopper which shall not require any wire, cap or clamp for holding it and which shall by reason of its form and of the materials of which it is composed afford a tight joint or seal under all circumstances." (Lines 13-17) Includes instructions and illustrations.
Date: February 11, 1896
Creator: Davis, Clifton H.
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Partner: UNT Libraries Government Documents Department
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