Inventor
YANAGISAWA TAKUMA
JP39 patents
⚠️ This page may combine multiple inventors who share the name “YANAGISAWA TAKUMA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PIONEER CORP
23 patentsUS6590857B2Jul 8, 2003
Optical disk
PIONEER CORP31 citations92
US7903048B2Mar 8, 2011
Information display apparatus and navigation apparatus
PIONEER CORP9 citations84
US6563773B1May 13, 2003
Tracking control apparatus
PIONEER CORP14 citations84
US7206277B2Apr 17, 2007
Optical pickup device and focal error detecting device therefor and wave aberration and focal error detecting device therefor
PIONEER CORP9 citations74
US7092341B2Aug 15, 2006
Data recording method and data recording medium
PIONEER CORP7 citations74
US6865144B2Mar 8, 2005
Optical pickup apparatus and tilt amount detecting method
PIONEER CORP7 citations74
US11650051B2May 16, 2023
Optical device
PIONEER CORP2 citations71
US7907200B2Mar 15, 2011
Seamless image viewing system and method
PIONEER CORP6 citations63
US7151736B2Dec 19, 2006
Objective lens and optical pickup device
PIONEER CORP3 citations63
US6333906B1Dec 25, 2001
Optical pickup and information reproducing apparatus
PIONEER CORP5 citations63
US7190642B2Mar 13, 2007
Focus servo device
PIONEER CORP2 citations62
US6801491B1Oct 5, 2004
Focus error detecting apparatus of optical pickup with a light separating and astigmatism generation optical element and detection method thereof
PIONEER CORP3 citations62
US12038304B2Jul 16, 2024
Optical device
PIONEER CORP0 citations60
US11703571B2Jul 18, 2023
Optical device
PIONEER CORP0 citations60
US7835250B2Nov 16, 2010
Optical pickup device and information recording/reproduction device
PIONEER CORP3 citations60
US7190664B2Mar 13, 2007
High density optical recording medium and method for reproducing thereof
PIONEER CORP1 citations52
US7835237B2Nov 16, 2010
Optical pickup device and information recording/reproducing apparatus
PIONEER CORP1 citations50
US9891433B2Feb 13, 2018
Virtual image generation device and head-up display
PIONEER CORP0 citations42
US7969836B2Jun 28, 2011
Optical pickup apparatus
PIONEER CORP0 citations42
US7821899B2Oct 26, 2010
Optical pickup device
PIONEER CORP0 citations42
US7142498B2Nov 28, 2006
Recorded information reproducing apparatus
PIONEER CORP0 citations42
US8004951B2Aug 23, 2011
Pickup device
PIONEER CORP0 citations41
US7200077B2Apr 3, 2007
Tilt angle detection device and method utilizing pattern identification
PIONEER CORP0 citations41
PIONEER ELECTRONIC CORP
9 patentsUS6580676B1Jun 17, 2003
Recording information reproducing apparatus with crosstalk canceler
PIONEER ELECTRONIC CORP25 citations92
US6124988ASep 26, 2000
Objective lens
PIONEER ELECTRONIC CORP20 citations92
US5850081ADec 15, 1998
Method for generating a focus error signal due to astigmatism and optical pickup device using the same
PIONEER ELECTRONIC CORP17 citations84
US5615206AMar 25, 1997
Optical disk
PIONEER ELECTRONIC CORP8 citations74
US5546372AAug 13, 1996
Information detection light intensity control apparatus in optical disc recorded-information reproducing apparatus
PIONEER ELECTRONIC CORP9 citations73
US5381391AJan 10, 1995
Optical recording medium having a third non-linear optical reflection film
PIONEER ELECTRONIC CORP14 citations73
US5365052ANov 15, 1994
Optical information reading apparatus with controlled numerical aperture relationship between focusing and receiving optical systems
PIONEER ELECTRONIC CORP9 citations73
US5856959AJan 5, 1999
Method for generating a focus error signal due to astigmatism and optical pickup device using the same
PIONEER ELECTRONIC CORP5 citations63
US5455817AOct 3, 1995
Second harmonics generating optical recording layer
PIONEER ELECTRONIC CORP0 citations52