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Motor
Patent for a new and improved motor. This design's "object is to provide a motor possessing superior advantages in point of simplicity, inexpensiveness, easy operation, and general efficiency" (lines 11-14).
Date:
November 6, 1883
Creator:
Watkins, Samuel H.
System:
The Portal to Texas History
Roller Bearing
Patent for improvement on roller bearings that include spaced rings and multiple rollers.
Date:
November 2, 1911
Creator:
Tatum, Franklin M.
System:
The Portal to Texas History