Disk DVD-ROM drive unit with a playback speed control and...

Disk for audio data, reproduction apparatus, and method of...

Disk having unique code for identifying its type for optical...

Disk having unique code for identifying its type for optical...

Disk playback apparatus

Disk player

Disk player

Disk player for constant angular velocity reproduction of a disk

Disk player for performing data reproduction recorded on a disk

Disk player with constant angular velocity

Disk reading apparatus with rotary speed adjustment feature

Disk recording and reproducing apparatus and method for use...

Disk recording and reproducing device

Disk recording apparatus and disk recording method

Disk recording apparatus and disk recording method

Disk recording apparatus for recording data by using zone...

Disk recording medium and reproduction method and apparatus ther

Disk recording medium and reproduction method and apparatus ther

Disk recording medium, disk drive apparatus, reproducing...

Disk recording medium, disk drive apparatus, reproduction...