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US965952A
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Apparatus for grinding twist-drills, borers, and the like.
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Drill-grinding machine.
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US822391A
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Apparatus for grinding drills, borers, and like tools.
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GB190314582A
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Improvements in the Production of Identical Cutting Surfaces in Borers Drills and the like and Apparatus therefor.
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GB190021889A
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Improvements in Saw Sharpening Machines
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Machine for grinding milling-cutters.
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Improvements in or connected with Emery Wheels or Polishing and Grinding Machines.
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