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in creator/contributor: "Church, Wells L."  
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Well-Drilling Apparatus.

Description: Patent for drilling well apparatuses that approximate the weight imposed so that the weight can be regulated to improve efficiency, including instructions and illustrations.
Date: April 28, 1914
Creator: Hughes, Howard R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Roller-Drill

Description: Patent for a roller drill that has a roller spindle which is detachable.
Date: November 28, 1911
Creator: Hughes, Howard Robard
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Roller-Drill

Description: Patent for a roller drill for drilling deep into rocks which bores small holes and is stronger than other models of roller drills.
Date: May 31, 1910
Creator: Hughes, Howard R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Roller-Drill

Description: Patent for a roller drill for boring holes into rocks which is stronger than other roller drills and is constructed differently than his previous patent for a roller drill.
Date: May 24, 1910
Creator: Hughes, Howard R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Roller Drill.

Description: Patent for roller drills that will leave a central core standing in the hole being formed composed of six cutting rollers.
Date: November 28, 1911
Creator: Hughes, Howard R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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