4. Metal tools and implements, making
  5. Tool sharpeners
  6. Cutting

John E. Byers

Inventor

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Drill bit device

Cutting by use of rotating axially moving tool – Tool or tool with support – With work-engaging structure detachable from cutting edge
Patent

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Drill bit device

Cutting by use of rotating axially moving tool – Tool or tool with support – With work-engaging structure detachable from cutting edge
Patent

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Sharpener device with guide means

Metal tools and implements – making – Tool sharpeners – Cutting
Patent

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Sharpening device for single edge type cutting blades

Metal tools and implements – making – Tool sharpeners – Cutting
Patent

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Profile ID: LFUS-PAI-P-1471423

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