Gerald Roullet

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Automatic optical focusing device

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Bidirectional optical wavelength multiplexer-demultiplexer

Multiplex communications – Wide area network – Packet switching
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Head control means for optical videodisc player

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
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Optical reading device comprising a focussing detection device

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
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Support apparatus for a flexible disc and disc reader using this

Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
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Profile ID: LFUS-PAI-P-484738

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