Inventor
FUSHIMI TETSUYA
JP44 patents
⚠️ This page may combine multiple inventors who share the name “FUSHIMI TETSUYA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
40 patentsUS6549497B2Apr 15, 2003
Optical reproducing method
HITACHI LTD244 citations99
US5936933AAug 10, 1999
Information recording medium and method and apparatus for recording and reproducing information using the same
HITACHI LTD105 citations99
US5377178ADec 27, 1994
Data recording/reproducing method and apparatus using a recording medium having clock marks recorded in a wobbled track for read/write synchronization
HITACHI LTD198 citations99
US6088307AJul 11, 2000
Wobble signal detecting circuit, wobble abnormality detecting circuit, information processing apparatus using these circuits and method and recording medium used in the apparatus or method
HITACHI LTD129 citations98
US6219331B1Apr 17, 2001
Information recording medium with tracks having a groove structure having a fixed cycle of wobble
HITACHI LTD37 citations97
US5930228AJul 27, 1999
Method and apparatus for recording and reproducing information using pseudo identification signal
HITACHI LTD53 citations97
US6545960B2Apr 8, 2003
Information recording medium and method and apparatus for recording and reproducing information using the same
HITACHI LTD15 citations96
US6542458B2Apr 1, 2003
Information recording medium having wobbled groves
HITACHI LTD21 citations96
US6388987B2May 14, 2002
Information recording medium having wobbled groove structure and plural zones
HITACHI LTD24 citations96
US5608710AMar 4, 1997
Phase changing recording medium with amorphous points each formed by a pair of high power and low recording pulses
HITACHI LTD81 citations96
US6345023B1Feb 5, 2002
Optical disc apparatus with different frequencies of wobble signal and clock signal for rotation control
HITACHI LTD39 citations93
US5761172AJun 2, 1998
Method of optical reproduction using pulsed light
HITACHI LTD21 citations93
US6091678AJul 18, 2000
Method and apparatus for detecting position of alternated land and groove of information recording medium
HITACHI LTD37 citations91
US5572502ANov 5, 1996
Optical disk apparatus
HITACHI LTD38 citations91
US6728176B2Apr 27, 2004
Information recording method
HITACHI LTD6 citations82
US6552978B2Apr 22, 2003
Information recording apparatus
HITACHI LTD8 citations82
US6545962B2Apr 8, 2003
Optical reproducing method for reproducing information on an optical medium having groove structure with fixed cycle of wobble
HITACHI LTD6 citations82
US6545961B2Apr 8, 2003
Optical reproducing method
HITACHI LTD7 citations82
US6490233B2Dec 3, 2002
Optical reproducing method
HITACHI LTD9 citations82
US7092330B2Aug 15, 2006
Information recording method
HITACHI LTD4 citations74
US7085202B2Aug 1, 2006
Information recording method
HITACHI LTD4 citations74
US6996036B2Feb 7, 2006
Information recording method
HITACHI LTD1 citations74
US6665244B2Dec 16, 2003
Optical reproducing method
HITACHI LTD4 citations74
US6580686B2Jun 17, 2003
Information recording medium recording data on wobbled groove structure of recording medium
HITACHI LTD1 citations74
US6542448B2Apr 1, 2003
Information recording apparatus for recording information on an optical medium having a groove structure with a fixed cycle of wobble
HITACHI LTD4 citations74
US6493295B2Dec 10, 2002
Information recording apparatus
HITACHI LTD4 citations74
US6388986B2May 14, 2002
Information recording medium having wobbled groove structure
HITACHI LTD1 citations74
US6438078B2Aug 20, 2002
Optical disc apparatus and method thereof
HITACHI LTD6 citations73
US6295258B1Sep 25, 2001
Method for recording and reproducing information by pre-pits detection
HITACHI LTD5 citations72
US7106669B2Sep 12, 2006
Information recording method
HITACHI LTD0 citations63
US7088653B2Aug 8, 2006
Information recording method
HITACHI LTD0 citations63
US7088654B2Aug 8, 2006
Information recording method
HITACHI LTD0 citations63
US7085208B2Aug 1, 2006
Information recording method
HITACHI LTD0 citations63
US7082087B2Jul 25, 2006
Information recording method
HITACHI LTD0 citations63
US7082085B2Jul 25, 2006
Information recording method
HITACHI LTD0 citations63
US7082083B2Jul 25, 2006
Information recording method
HITACHI LTD0 citations63
US7082096B2Jul 25, 2006
Information recording method
HITACHI LTD0 citations63
US6754144B1Jun 22, 2004
Optical information recording/reproducing apparatus
HITACHI LTD6 citations63
US6850470B2Feb 1, 2005
Optical disc apparatus and method thereof
HITACHI LTD2 citations62
US6301210B1Oct 9, 2001
Optical disc apparatus and method thereof
HITACHI LTD4 citations62
HITACHI LG DATA STORAGE INC
2 patentsUS8000194B2Aug 16, 2011
Optical disc apparatus, method of adjusting focus offset for optical disc apparatus, and program for executing focus offset adjustment
HITACHI LG DATA STORAGE INC0 citations52
US7668060B2Feb 23, 2010
Optical disc apparatus, method of adjusting focus offset for optical disc apparatus, and program for executing focus offset adjustment
HITACHI LG DATA STORAGE INC0 citations52