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United States Utility Patents
5,084,850 - 5,084,859

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NumberTitle
5,084,850 Apparatus for detecting focus error signal
5,084,851 Optical head for recording and playing back optical information
5,084,852 System for recording digital information in a pulse-length modulation format
5,084,853 Spring loaded flywheel cleaning apparatus for a pick up lens of a compact disc player
5,084,854 Optical disk reproducing apparatus
5,084,855 Device for preventing the erroneous insertion of a disc in a CD player for vehicles
5,084,856 Cutting apparatus for an optical disc
5,084,857 Information recording method using a modulated recording beam at high, intermediate and low power levels
5,084,858 Reproducing apparatus having an arithmetic circuit to linearly combine an inverse matrix of crosstalk ratios relative to the adjacent tracks and signals read from the adjacent and traced tracks
5,084,859 Multi-magazine disc player



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