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Machine-Brake.
Patent for machine brake for regulating the speed of an automatic fan.
Date:
December 14, 1915
Creator:
Reeves, Elijah Winston
System:
The Portal to Texas History
Electric Switch
Patent for an electric switch. Illustration included.
Date:
December 10, 1912
Creator:
Ramsay, Robert L.
System:
The Portal to Texas History