Inventor
KOIKE RYUICHI
JP7 patents
⚠️ This page may combine multiple inventors who share the name “KOIKE RYUICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
6 patentsUS5608717AMar 4, 1997
Information recording media and optical disc presenting a character or a graphic pattern formed by specified pit patterns on data tracks
HITACHI LTD196 citations98
US5875156AFeb 23, 1999
Playback system for an optical disc representing a character or a graphic pattern formed by specified pit patterns
HITACHI LTD84 citations96
US5751671AMay 12, 1998
Information recording media and optical disk, disk having specific data so that a visible pattern of characters or graphics appear on a copy disk
HITACHI LTD92 citations96
US5737306AApr 7, 1998
Playback system for an optical disc presenting a character or a graphic pattern formed by specified pit patterns on data tracks
HITACHI LTD19 citations92
US4127799ANov 28, 1978
Apparatus for damping rotation of turntable
HITACHI LTD33 citations92
US5963517AOct 5, 1999
Disk reproducing speed control method and a disk reproducing apparatus using the same
HITACHI LTD38 citations91