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Well-Boring Drill.

Description: Patent for for a rotary well boring drill designed to have a simple yet durable structure.
Date: August 14, 1917
Creator: Reed, Clarence Edward
Partner: UNT Libraries Government Documents Department

Roller Boring-Drill.

Description: Patent for an invention relating to "boring drills of the type having roller forms of cutters" (line 9). Structure is explained and illustration of invention is included.
Date: August 14, 1917
Creator: Reed, Clarence Edward
Partner: UNT Libraries Government Documents Department

Rotary Boring-Drill.

Description: Patent for a rotary boring-drill that can easily be assembled or disassembled without the aid of a special tool, is equipped with removable cutters, has clearance between the cutters to prevent material becoming packed around them, and is arranged to mix material disintegrated by the cutters into a mud.
Date: August 28, 1917
Creator: Hughes, Howard R.
Partner: UNT Libraries Government Documents Department

Attachment for Internal-Combustion Engines.

Description: Patent for an invention relating to the attachment for internal combustion engines that will provide moisture through the form of liquid or vapors. Other objectives and illustrations of invention are included.
Date: August 14, 1917
Creator: Potts, Hugh
Partner: UNT Libraries Government Documents Department

Attachment for Internal Combustion Engines.

Description: Patent for an attachment to internal combustion engines that allows for vaporizing part of the fuel mixture to introduce air and steam that aid combustion efficiency.
Date: August 16, 1917
Creator: Lynch, Floyd W.
Partner: UNT Libraries Government Documents Department
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