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6 Matching Results
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6
Well-Drill Wrench.
Patent for use with oil well drills to enable easier rotation and less friction. The invention aids in quick and easy adjustments to oil well parts.
Date:
January 6, 1920
Creator:
Ellinger, William H.
System:
The Portal to Texas History
Boll Breaking Machine.
Patent for new and useful improvements in Boll-Breaking machines.
Date:
January 5, 1915
Creator:
Bradford, McDuffee
System:
The Portal to Texas History
Electric Switch.
Patent for switches or connectors that connect sections of wires used for telephones or telegraphs
Date:
January 9, 1912
Creator:
Du Val, James Erl & Lee, Ezra A.
System:
The Portal to Texas History
Animal Yoke Or Poke.
Patent for a new and useful animal yoke or poke, including instructions and illustrations.
Date:
January 23, 1900
Creator:
Worley, Frank Athar
System:
The Portal to Texas History
Cane-Header.
Patent for a new and useful improvement in cane headers, including instructions and illustrations.
Date:
January 23, 1900
Creator:
Easley, William Dudley
System:
The Portal to Texas History
Dental - Chair.
Patent for a new and useful dental chair to "easily adjust to various positions and be folded into very compact form for transportation or storage" (line 13-14).
Date:
January 4, 1898
Creator:
Rose, Nicholas M.
System:
The Portal to Texas History