4. Telegraphy
  5. Systems
  6. Position coordinate determination for writing

Daniel Royer

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Liquid level detector by guided elastic waves

Measuring and testing – Liquid level or depth gauge
Patent

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Liquid presence detector having a composite waveguide for acoust

Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent

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Marking system using elastic surface waves

Telegraphy – Systems – Position coordinate determination for writing
Patent

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Optical-pickup coordinatometer

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

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Selenium layer piezoelectric device

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent

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Profile ID: LFUS-PAI-P-367674

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