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Automatic Telephone-Exchange System.

Description: Patent for "a simple system and arrangement which is especially adapted for a telephone exchange, which enables the instruments to be connected by a single wire, which dispenses with the use of an operator at the central station, which has automatic means for registering the messages sent by each subscriber, and which is provided with an automatic switching device by means of which one subscriber may connect with any other" (lines 10-19).
Date: December 5, 1893
Creator: Serdinko, John
Partner: UNT Libraries Government Documents Department

Sulky-Plow.

Description: Patent for an improved, simple, and durable sulky-plow that "may be shifted laterally by the driver during the act of plowing whenever such action is deemed advisable, thereby changing the cut whenever occasion may demand" (lines 10-14). The plow can attach to any type of wheeled plow.
Date: June 20, 1893
Creator: Willmann, Joseph
Partner: UNT Libraries Government Documents Department
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