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United States Utility Patents
5,293,360 - 5,293,369

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NumberTitle
5,293,360 Magnetic field generating device
5,293,361 Information processing method and apparatus therefor in which an erasing device is driven for a period longer than a necessary period
5,293,362 Optical disc play-back device of the carousel type, having a mechanism for reducing access type to any selected disc
5,293,363 Optical head apparatus with light weight movable lens holder
5,293,364 Track access control device for an optical disk drive
5,293,365 Track control circuit for optical card recording/reproducing apparatus
5,293,366 Information recording and reproducing apparatus provided with means for adding to a tracking signal offset corresponding to the positional deviation of a recording spot and a reproducing spot
5,293,367 Optical pickup head wherein an error signal is produced by detecting a phase difference in diffraction beams from a holographic optical element
5,293,368 Apparatus from reproducing address data on a disk
5,293,369 Asynchronous sampling digital detector system for magnetic and optical recording channels



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