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Combined Pencil Holder and Sharpener.
Patent for a combined pencil holder and sharpener, which uses the sharpener as a pencil cap.
Date:
November 30, 1909
Creator:
Haase, Conrad H.
System:
The Portal to Texas History
Process of Refining Asphaltic Mineral Oils.
Patent for process for refining asphaltic mineral oils such as might be found in wells in Texas and Louisiana. Designed to remove asphaltum.
Date:
November 11, 1902
Creator:
Mims, John Carwile
System:
The Portal to Texas History