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United States Utility Patents
5,999,500 - 5,999,509

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NumberTitle
5,999,500 Data cartridge interlock release actuator system
5,999,501 Objective lens actuator and method for producing the same
5,999,502 Optical information recording/reproducing apparatus having focus servo control compensation for lands and grooves
5,999,503 Focus control apparatus in multi-layered disk reading apparatus utilizing acceleration, deceleration and focus error signals to switch between layers of the disk
5,999,504 Optical disc and optical disc apparatus for forming wobbled tracks
5,999,505 Information processing device for continuously and discontinuously processing recorded data and recording medium therefor
5,999,506 Data recording/reproducing device and recording medium
5,999,507 Objective lens driving apparatus
5,999,508 Recording medium, recording apparatus, reproducing method, and reproducing apparatus
5,999,509 Optical pickup device with two independent light beams and an integrated prism for providing return light with astigmatism



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