4. Woodworking
  5. Special-work machine
  6. Pencil sharpening

Richard A. Kerr, Jr.

Inventor

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Battery tester

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Design Patent

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Lead-pencil sharpener

Woodworking – Special-work machine – Pencil sharpening
Patent

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Profile ID: LFUS-PAI-P-1699231

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