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Spring-Washer for Piano-Flanges.

Description: Patent for a spring washer for piano flanges that prevents the flanges from becoming loose over time.
Date: December 5, 1911
Creator: Mayor, Enoch Allen
Partner: UNT Libraries Government Documents Department

Coin-Controlled Vending-Machine

Description: Patent for a pencil vending machine that is coin-operated, with illustrations.
Date: September 5, 1911
Creator: Mathes, John W.
Partner: UNT Libraries Government Documents Department

Bookbinding

Description: This is a letter patent for the bookbinding invention as a means for holding books, pamphlets, catalogs, and other similar paper materials together. The purpose of this invention is to make it possible to place additional material inside the same covers, and with the original contents of a book without breaking or tearing the binding.
Date: June 22, 1911
Creator: Robinson, Edward K.
Partner: UNT Libraries Government Documents Department

Coin-Controlled Vending-Machine

Description: Patent for a coin-operated vending machine. Illustrations included.
Date: June 6, 1911
Creator: Boucher, Horace E.
Partner: UNT Libraries Government Documents Department
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