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Churn.
Patent for a churn with a construction which will prevent "access of objectionable matter to the churn-body" (lines 14-15) including instructions and illustrations.
Date:
April 3, 1900
Creator:
Hargrove, Kincheon W.
System:
The Portal to Texas History
Automatic Gas-Release Packer.
Patent for automatic gas release packer that uses constant pressure regulated by spring-controlled valves for better control when lifting oil out of wells.
Date:
April 11, 1922
Creator:
Cummings, William J.
System:
The Portal to Texas History
Grapple.
Patent for improving grapples for regaining tools, particularly those that can be hidden and submerged.
Date:
April 26, 1921
Creator:
James. C. Ginter.
System:
The Portal to Texas History