4. Geometrical instruments
  5. Distance measuring
  6. Scale reading position sensor

David C. Falk

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Digital tape rule with transmitter

Geometrical instruments – Distance measuring – By flexible tape
Patent

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Horticultural device

Earth working – Lawn edger – Rolling or driven cutter
Patent

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Line marking apparatus

Bleaching and dyeing; fluid treatment and chemical modification – Diffusion transfer dyeing process – transfer sheet and product – Dry heat treatment for penetration
Patent

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Optical fishing line meter

Geometrical instruments – Distance measuring – Scale reading position sensor
Patent

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Photoelectric line measuring device with digital display

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent

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Profile ID: LFUS-PAI-P-1244117

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