Inventor
TOYOTA KIYOSHI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “TOYOTA KIYOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
12 patentsUS6529454B1Mar 4, 2003
Integrated optical component, optical pickup, and optical disc device
SONY CORP25 citations92
US5742577AApr 21, 1998
Prism has a plurality of reflective regions each with a predetermined phase difference
SONY CORP26 citations92
US5563869AOct 8, 1996
Prism has a plurality of reflective regions each with a predetermined phase difference
SONY CORP9 citations73
US7345982B2Mar 18, 2008
Optical pickup device, optical disk drive, optical device and composite optical element
SONY CORP2 citations63
US7064900B2Jun 20, 2006
Optical pickup device and optical disk device and optical device and composite optical element
SONY CORP3 citations63
US5732060AMar 24, 1998
Optical pickup and optical recording medium reproducing apparatus having a wire grid unit
SONY CORP2 citations63
US5577018ANov 19, 1996
Phase changing apparatus and optical pickup apparatus for magneto-optic storage device using same
SONY CORP4 citations62
US4777356AOct 11, 1988
Reader for optical type record card
SONY CORP5 citations62
US7821905B2Oct 26, 2010
Optical pickup device and optical disk device
SONY CORP4 citations61
US5448535ASep 5, 1995
Head position control device
SONY CORP5 citations61
US7616548B2Nov 10, 2009
Optical pickup apparatus and optical disc apparatus
SONY CORP0 citations42
US7248544B2Jul 24, 2007
Optical head and recording and/or reproducing apparatus employing same
SONY CORP0 citations40