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Attachment for Lifting-Jacks
Patent for an attachment for lifting jacks.
Date:
March 28, 1911
Creator:
Porter, Horton B.
System:
The Portal to Texas History
Thermostat.
Patent for a thermostat that automatically regulates temperatures and is operated "in conjunction with an electric current or the like" (lines 12-13) including instructions and illustrations.
Date:
April 28, 1914
Creator:
Hinson, Robert E.
System:
The Portal to Texas History
Plow.
Patent for certain new and useful improvements in plows. This improvements are to " render the plow right and strong and easy-running, reducing the effort required by the plowman to handle the plow to a minimum, and to render the handles and beam and plow-plate readily adjustable as regards pitch and height (line 10 - 16).
Date:
December 28, 1897
Creator:
Kirkpatrick, James M. & Files, Jerry B.
System:
The Portal to Texas History