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Adjustable WIndow Shade Bracket

Description: Patent for an adjustable window shade.
Date: May 20, 1913
Creator: Brown, James R.
Partner: UNT Libraries Government Documents Department

Worm Drive Mechanism for Windmill Engines

Description: Patent is for improved wind mill drive shaft and reciprocating member called a "worm".
Date: May 16, 1917
Creator: Eller, Tom & Eller, Pernell D.
Partner: UNT Libraries Government Documents Department

Rotary Engine.

Description: Patent for a new rotary engine containing a steam chest to hold fluid which flows into an exhaust chamber to reduce back pressure.
Date: May 19, 1914
Creator: Rhoades, Charles A.
Partner: UNT Libraries Government Documents Department
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