4. Dynamic information storage or retrieval
  5. Storage medium structure
  6. Optical track structure

Robert M. Pettigrew

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Article detection and/or recognition using magnetic devices

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Data storage medium

Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent

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Data storage medium

Recorders – Record receivers and/or driving means therefor – Laminated – impregnated – or coated bases
Patent

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Datum sensing using optical grating

Optics: measuring and testing – By polarized light examination – With light attenuation
Patent

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Displacement measuring apparatus and method

Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent

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Profile ID: LFUS-PAI-P-292598

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