Resource Type
Counties
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Switch.
Patent for a switch for trolley lines that can be triggered from inside the trolley car.
Date:
December 12, 1911
Creator:
Torrence, Otis M.
System:
The Portal to Texas History
Rotary Churn.
Patent for a manual rotary churn with two dasher blades, including instructions and illustrations.
Date:
March 12, 1912
Creator:
Martin, Harry T.
System:
The Portal to Texas History