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in creator/contributor: "Blackwood, J. H."  
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Method Of Drilling Wells

Description: Patent for a method of drilling wells. This invention is known as the rotary process that deals with alluvial deposits at different levels such as sand, water flows, gravel, gas under pressure, and boulders. Illustration included.
Date: October 30, 1906
Creator: Decker, Harry R.
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Partner: UNT Libraries Government Documents Department

Signal Lock For Mail Boxes

Description: Patent for a signal lock for mail boxes. This "invention relates to devices for locking the signals used on house letter-boxes, and has for its object the provision of a signal lock secured to the inside of the mail-box" (lines 9-13). Illustrations included.
Date: October 23, 1906
Creator: Patterson, Samuel & Wiseman, John W.
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Partner: UNT Libraries Government Documents Department

Automatic Switch Indicator

Description: Patent for an automatic switch indicator. This invention is designed to "prevent accidents resulting from misplaced switches, due to the carelessness of the railroad employees or the inability of the engineer to see the customary track-signals" (line 14-19). Illustrations included.
Date: October 23, 1906
Creator: Coffin, Edward F.; Shaw, Carey & Green, Samuel
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Partner: UNT Libraries Government Documents Department

Nut Lock

Description: Patent for a nut lock. Illustrations included.
Date: July 4, 1905
Creator: Slayton, Charles E. & Zellner, Daniel L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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