4. Geometrical instruments
  5. Gauge
  6. Continuous gauging

Harold Welch

Inventor

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Adjustable data entry keyboard

Typewriting machines – Key-board or key lever-actuating mechanism – Key-cap or key-stem structure
Patent

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Contacting thickness gauge for moving sheet material

Geometrical instruments – Gauge – Continuous gauging
Patent

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Keyboard having a lighting system

Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1817813

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