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Rotary Core-Drill.

Description: Patent for a rotary drill for drilling into and removing solid core samples of hard formations encountered in deep oil wells. It is designed to remove the core sample intact so the composition of the formation can be analyzed.
Date: May 1, 1917
Creator: Smith, Thomas B.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Automobile-Headlight-Lamp Mounting.

Description: Patent for the improvement of automobile headlight lamp mountings. Improvement on lamp bracket described in Letters Patent Number 1,129,207, issued to the author on February 23, 1915.
Date: May 1, 1917
Creator: Kitching, David C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Collar Attachment

Description: Patent for a collar attachment to be used with fold down collars to provide a means to hold the collar closed, with illustrations.
Date: May 1, 1917
Creator: Allen, Joseph H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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