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Indicator for Pressure Gages

Description: Patent for an indicator for pressure gages. Illustration included.
Date: July 19, 1910
Creator: Fields, Roberts E.
Partner: UNT Libraries Government Documents Department

Box Bull and Calf Wheel Gudgeon.

Description: Patent for protection and strengthening of box bull and calf wheel gudgeons. The purpose is to prevent various troubles with well drilling (oil, etc.).
Date: July 19, 1921
Creator: Taylor, James Thomas
Partner: UNT Libraries Government Documents Department
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