4. Metal working
  5. Filing

Joseph D. Konrad

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Belt surfacing tool

Leather manufactures – Machines – Roughing
Patent

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Guide for ellipse construction

Geometrical instruments – Scriber – Curved line
Patent

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Method and means for centerless circle construction

Geometrical instruments – Scriber – Curved line
Patent

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Patent-drafting aid

Geometrical instruments – Miscellaneous – Light direction
Patent

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Surfacing tool

Metal working – Filing
Patent

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Profile ID: LFUS-PAI-P-2940

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