4. Optics: image projectors
  5. Selective data retrieval
  6. Plural picture rows on single microcard

Robert F. Johnston

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Automatic calibration for D.C. transducers

Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent

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Automatic focusing system

Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
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Microfiche reader

Optics: image projectors – Selective data retrieval – Plural picture rows on single microcard
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Photoreceptor assembly for automatic focusing system

Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent

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Reversible ribbon drive

Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent

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Profile ID: LFUS-PAI-P-593728

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