UNT Libraries Government Documents Department - 2 Matching Results
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- Cross-Roller Bit.
- Patent for a certain new and useful improvement in cross-roller bits. Invention relates to "improvements in rotary boring drills for use in drilling wells for water, oil or gas and has particular reference to drills of the so called cross roller type for use in hard formation."
- Hydraulic Clutch and Traction Equalizer.
- Patent for hydraulic clutches and traction equalizers. A "device for automobiles or other mother driven vehicles designed to be used in the place of the mechanism commonly known as the differential."