Inventor
TANAKA HISAMITSU
JP3 patents
Patents
3 patentsUS5541909AJul 30, 1996
Optical disc with phase pits and a reproducing apparatus for data recorded on the optical disc
HITACHI LTD27 citations92
US6091678AJul 18, 2000
Method and apparatus for detecting position of alternated land and groove of information recording medium
HITACHI LTD37 citations91
US5179545AJan 12, 1993
Tracking control apparatus for controlling the tracking of a target track
HITACHI LTD17 citations72