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Display Advertising-Machine.

Description: Patent for an advertising display that carries a number of large advertisement sheets that are revolved and held stationary to periodically display each advertisement in repeating succession.
Date: October 9, 1917
Creator: Barnett, John B.
Partner: UNT Libraries Government Documents Department

Coin-Controlled Vending-Machine.

Description: Patent for a con-controlled vending-machine that sells stamps and similar products including illustrations. The machine "compels a complete cycle of operation for each coin received and cannot be rendered inoperative through the deposit of a plurality of coins in the chute or while the operation of the machine is in progress." (lines 14-17).
Date: October 9, 1917
Creator: Wolford, William O.
Partner: UNT Libraries Government Documents Department
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