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Swingletree
Patent for a swingletree that equalizes the strain of the draft animal when the traces are connected in an irregular manner.
Date:
July 20, 1920
Creator:
Bosse, William F.
System:
The Portal to Texas History
Harrow
Patent for improvement for harrows, "which may be adjusted so as to spread them apart or bring the same close together." (lines 15-17) The adjustable frame of the harrow allows the device to be used for different purposes of cultivation.
Date:
February 20, 1912
Creator:
Robbins, John F.
System:
The Portal to Texas History