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Adding Machine
Patent for a machine that adds numbers together using "key actuated accumulating wheels" to reach the desired sum, including illustrations.
Date:
September 22, 1913
Creator:
Moody, Jason B.
System:
The Portal to Texas History
Transmitting Telegraph Relay
Patent for Transmitting Telegraph Relay and it uses.
Date:
September 22, 1913
Creator:
Mains, Thane H.
System:
The Portal to Texas History