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Combined Rule and Square.
Patent for new and useful Improvements in Combined Rules and Squares which makes it "possible to form a rigid straight rule or one or more rigid squares" (lines 24-25), including illustration and instructions.
Date:
August 21, 1917
Creator:
Grossman, Edwin
System:
The Portal to Texas History
Watering-Trough.
Patent for a valve that controls the flow of drinking water from a reservoir or tank into a trough. It can be operated by domestic animals and automatically shuts off when they are finished drinking.
Date:
August 21, 1917
Creator:
Atkinson, George C.
System:
The Portal to Texas History
Planter Shoe
Patent for a planter shoe. Illustration included.
Date:
August 16, 1910
Creator:
Pogue, Steward A.
System:
The Portal to Texas History
Plumb Level
Patent for a plumb level. Illustrations included.
Date:
August 20, 1912
Creator:
Brooks, Robert L.
System:
The Portal to Texas History