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Automatic Telephone-Exchange System.
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
System:
The Portal to Texas History
Improvement in Wheel-Plows.
Patent for an improvement in wheel plows made so that "the plowing may be done by passing back and forth in parallel lines" (lines 17-18).
Date:
September 5, 1871
Creator:
Coreth, Rudolph
System:
The Portal to Texas History