UNT Libraries Government Documents Department - 6 Matching Results

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Automatic Pipe Coupling
Patent for improvement on the methods of controlling oil flow.
Automobile-Lock.
Patent for a padlock and mount for the steering column of an automobile.
Device for Forming Screens
Patent for a device for forming screens that consist of perforated pipes and screening wires, which will prevent displaced wires and torn pipes during use.
Valve Remover.
Patent for "an improvement in combination tools...adapted for use with internal combustion engines...mechanism is provided for assisting in valve removing." [lines 8-14]
Well-Boring Apparatus
Patent for a new and improved well-boring apparatus that rotates a drill stem. The drill is then elevated when it is desired to unscrew the joints.
Well Capping Device.
Patent for "new and useful improvements in a well capping device." [lines 9-10]
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