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Trolley-Pole.

Description: Patent for trolley-poles for electric cars which provides "a simple, inexpensive, and highly efficient trolley-wire finder, and one which is readily applicable to trolley-poles such as at present in use and is adapted to be quickly and easily raised to an operative position and when released is adapted to gravitate to a position below and out of the way of the trolley-wire" (lines 15-22).
Date: December 11, 1900
Creator: Schroeter, William & Kautzmann, August
Partner: UNT Libraries Government Documents Department

Piano Action

Description: Patent for piano actions. This invention provides a connection between the bridle strap and the hammer butt of a piano action. Illustration included.
Date: May 21, 1907
Creator: Deutsch, John H.
Partner: UNT Libraries Government Documents Department

Jack

Description: Patent for a Jack. This design is operated by fluid pressure for use with driving axles and wheels.
Date: June 30, 1903
Creator: Tuggle, Samuel Ritchie & Doering, Charles William
Partner: UNT Libraries Government Documents Department
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