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Plow.
Patent for a plow that has "a mold-board of independently-yielding bars and the upper end thereof mounted upon yielding supports so that better results are attained and the earth broken up as it is thrown up by the point and turned aside and completely over as soon as it comes in contact with the said wires or spring rods" (lines 12-19). The mold board can easily be changed.
Date:
December 5, 1893
Creator:
Fancher, Alexander R.
System:
The Portal to Texas History
Adjustable Window-Shade
Patent for an adjustable window-shade that is more useful and can be "raised and lowered in its entirety" (lines 10-11) including instructions and illustration.
Date:
December 5, 1916
Creator:
Hayes, George Daniel
System:
The Portal to Texas History