Inventor
NUMATA TOMIYUKI
JP18 patents
⚠️ This page may combine multiple inventors who share the name “NUMATA TOMIYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SHARP KK
17 patentsUS5831953ANov 3, 1998
Optical disk device using an optical pickup as a read mechanism for detecting a thickness of the substrate of an optical disk
SHARP KK35 citations92
US5729517AMar 17, 1998
Data detecting circuit
SHARP KK43 citations92
US5434829AJul 18, 1995
Information reproducing apparatus for properly synchronizing the reproducing of recorded information
SHARP KK35 citations92
US5315571AMay 24, 1994
Information recording and reproducing device providing faster access time to a recording medium
SHARP KK44 citations92
US5170389ADec 8, 1992
Semiconductor laser driving circuit with control circuit power voltage monitor for preventing inadvertent recording
SHARP KK23 citations92
US5101386AMar 31, 1992
Track jumping apparatus for an optical disk pickup
SHARP KK19 citations74
US5084848AJan 28, 1992
Feedback control apparatus in an optical recording and reproducing device
SHARP KK10 citations74
US5008888AApr 16, 1991
Semiconductor laser driving apparatus
SHARP KK8 citations74
US5010540AApr 23, 1991
Apparatus for recording and reproducing information on and from an optical disk
SHARP KK8 citations73
US7206351B2Apr 17, 2007
Signal evaluation devices and signal evaluation methods, signal quality evaluation methods and reproducing devices and recording devices
SHARP KK8 citations72
US6967917B1Nov 22, 2005
Optical disk and optical disk apparatus using spatially separated grooves and lands for recording tracks
SHARP KK4 citations63
US5383174AJan 17, 1995
Optical disk apparatus
SHARP KK3 citations63
US7369479B2May 6, 2008
Optical miniaturized module, optical pickup device, and optical disk device provided with light source and photodetector
SHARP KK2 citations62
US5056076AOct 8, 1991
Method for controlling the rotational velocity of an information recording disk
SHARP KK3 citations62
US4993012AFeb 12, 1991
Record face identifying device for magneto-optic record medium
SHARP KK2 citations61
US8050154B2Nov 1, 2011
Drive control apparatus, drive control method and optical pickup apparatus
SHARP KK0 citations51
US5018120AMay 21, 1991
Optical recording medium track indexing system
SHARP KK1 citations51