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| Patent ID | Title | Date Filed |
| 6163515 | Optical disk writing control device
| March 27, 1998 |
| 5798990 | Transferring information via the lead-in area of an information carrier
| September 16, 1996 |
| 5745454 | Recording medium having text information recorded thereon and reproducing apparatus
| September 20, 1996 |
| 5719841 | Method and apparatus for recording and/or reproducing from recording media
| September 21, 1995 |
| 5703850 | Data retrieval system and method within a constant angular velocity CD-ROM
| June 18, 1996 |
| 5684768 | Method and apparatus for forming unit from image data, sound data, and header data divided at predetermined positions therein, and method, apparatus, and recordig medium for reproducing unit
| April 5, 1995 |
| 5633847 | Apparatus for recording on and playback from both sides of a disk shaped recording medium
| July 25, 1995 |
| 5623468 | Disk apparatus for detecting address marks from a recording disk having data recorded in a zoned constant angular velocity type system
| September 13, 1994 |
| 5587979 | Information carrier having information packets containing coded text or image information relating to different categories, arrangement for reading such information carrier and a system including such arrangement and information carrier
| April 5, 1993 |
| 5577013 | Optical information control device and synchronizing method thereof
| February 2, 1996 |
| 5563854 | Optical information accessing system capable of generating one sector initiation signal for each sector
| July 22, 1994 |
| 5533003 | Recording device capable of detecting the change in length and position of the pit edge
| June 21, 1994 |
| 5485442 | Display device for a compact disc player and a compact disc
| July 28, 1993 |
| 5446714 | Disc changer and player that reads and stores program data of all discs prior to reproduction and method of reproducing music on the same
| July 15, 1993 |
| 5432762 | Detection apparatus for detecting sector marks of optical disk and optical disk access apparatus
| November 10, 1993 |
| 5363360 | Method and apparatus for detecting and processing synchronization marks extracted from a prerecorded wobbled groove on a compact disk
| September 27, 1993 |
| 5359582 | Subcode reading apparatus for a compact disc player
| December 28, 1992 |
| 5315568 | Apparatus and method for accessing sectors of a rotating disk
| November 12, 1992 |
| 5293549 | Digital signal apparatus for correctly demodulating data despite a fluctuation in reading rate or variation in regenerated pulse duration due to abnormalities in a recording medium from which data is being read
| May 12, 1992 |
| 5282186 | Method and apparatus for recording and reproducing picture information and recording medium
| January 25, 1993 |
| 5278815 | Digital data reproducing apparatus
| September 25, 1991 |
| 5243582 | Apparatus for reproducing digital audio information related to musical accompaniments
| July 2, 1991 |
| 5237552 | Sector mark detection in long burn pattern for optical data disks
| December 24, 1991 |
| 5218450 | Apparatus for reproducing information from a recording medium in accordance with a search command
| August 20, 1992 |
| 5170385 | Recording medium with unembossed area indicating sector divisions
| October 25, 1990 |
| 5159143 | Information recording medium player for controlling musical devices using a musical instrument digital interface (MIDI) format signal
| January 24, 1991 |
| 5153869 | Apparatus for recording information on an optical disk with a modified constant linear density system
| December 26, 1989 |
| 5148422 | Optical recording medium having a data recording track with offset data storing regions
| August 21, 1990 |
| 5134500 | Video disk player with disk code demodulation using reproduced sync signal
| February 1, 1990 |
| 5130863 | Digital signal recording apparatus for recording plural kinds of digital information signals having different respective bit rates
| March 28, 1989 |
| 5083303 | Sector mark detecting apparatus in optical disc apparatus
| April 27, 1989 |
| 5063551 | Method and apparatus of recording and reproducing picture information and recording medium
| January 31, 1989 |
| 5060219 | Recording system for recording only those types of information which are specified by the record carrier
| December 20, 1988 |
| 4982110 | Clock generator circuit and a synchronizing signal detection method in a sampled format system and a phase comparator circuit suited for generation of the clock
| June 19, 1989 |
| 4953153 | Data reproducing device controlling image display dependent upon loss of time data
| September 9, 1988 |
| 4947264 | Synchronizing circuit for a video disc playback device
| August 1, 1989 |
| 4942551 | Method and apparatus for storing MIDI information in subcode packs
| June 24, 1988 |
| 4935913 | Optical information recording and reproducing apparatus
| April 6, 1988 |
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