4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Optical or pre-photocell system

Alfons Ernst

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Apparatus and method for correcting errors in a length or angle

Geometrical instruments – Area integrators – Electrical
Patent

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Apparatus for measuring the angular displacement of two objects

Geometrical instruments – Miscellaneous – Light direction
Patent

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Compensation of errors in incremental measuring or positioning i

Geometrical instruments – Area integrators – Electrical
Patent

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Device for measuring feed movement

Expansible chamber devices – With inspection window in expansible chamber wall portion – With lock
Patent

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Digital electrical angle-measuring device

Geometrical instruments – Miscellaneous – Light direction
Patent

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Profile ID: LFUS-PAI-P-32596

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