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in subjects: "sharpening machines"  
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Safety-Razor-Blade Sharpener.

Description: Patent for a safety razor blade sharpener with an improved arrangement of the metal grinding elements and a novel blade holder that can hold various types of blades and sharpen both sides, including illustrations.
Date: May 8, 1917
Creator: Hauser, Peter D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Saw-Sharpening Machine.

Description: Patent for improvements in "that class of saw-sharpening machines in which straight-edge-filing devices reciprocally movable are provided and in which ratchet mechanism for feeding the saw is also included" (lines 8-12) including illustrations.
Date: February 18, 1902
Creator: Phelps, Ruben P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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