7 Matching Results

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Index and Trial-Balance.

Description: Patent for improvement in indexes and trial-balances by using removable spring-strips to hold all the papers together in one place and can be easily remove when needed. Illustration is included.
Date: April 2, 1901
Creator: Templeton, Allison
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Bit for Well-Drilling Apparatus.

Description: Patent for a rotary expansion bit for use with well-drilling apparatuses. The bit can be adjusted without removing the well tubing, and can drill a hole large than the tubing in order to insert casing sections.
Date: April 22, 1902
Creator: Sloan, James W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Articulating Plate

Description: Patent for "new and useful articulating plate" (lines 5-6), including illustration and instructions.
Date: April 11, 1900
Creator: Driskill, Theodore Frederick
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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