Inventor · disambiguated record
Hajime Utsunomiya
Also filed as: UTSUNOMIYA HAJIME
75 granted patents·16 pending applications·1,450 citations·filing 1987–2023
99Inventor score
Top patents by PatentIndex Score
91 records- 0196US7166347B2Optical information recording mediumTDK CORP·Filed 2004·Granted Jan 23, 2007·62 cites·7 claims
- 0296US6965556B1Optical information medium having high resolution beyond a diffraction limit and reading methodTDK CORP·Filed 2000·Granted Nov 15, 2005·68 cites·10 claims
- 0394US7160597B2Optical information recording mediumTDK CORP·Filed 2004·Granted Jan 9, 2007·43 cites·7 claims
- 0494US7157128B2Optical information recording mediumTDK CORP·Filed 2004·Granted Jan 2, 2007·42 cites·12 claims
- 0593US12248205B2Optical modulation element and method for driving optical modulation elementTDK CORP·Filed 2021·Granted Mar 11, 2025·2 cites·3 claims
- 0693US7167440B2Optical information recording mediumTDK CORP·Filed 2004·Granted Jan 23, 2007·41 cites·7 claims
- 0793US6537721B2Optical recording medium and method for its initializationTDK CORP·Filed 2000·Granted Mar 25, 2003·39 cites·5 claims
- 0893US6430128B1Method for reading optical information medium and optical information mediumTDK CORP·Filed 2000·Granted Aug 6, 2002·40 cites·3 claims
- 0993US5430706AMagneto-optical disk having lands and grooves for recording informationTDK CORP·Filed 1994·Granted Jul 4, 1995·62 cites·28 claims
- 1092US7182990B2Optical information recording mediumTDK CORP·Filed 2004·Granted Feb 27, 2007·36 cites·5 claims
- 1191US6329036B1Optical recording medium and useTDK CORP·Filed 1999·Granted Dec 11, 2001·60 cites·16 claims
- 1290US7141289B2Optical information recording mediumTDK CORP·Filed 2004·Granted Nov 28, 2006·28 cites·11 claims
- 1390US6154437APhase-change optical recording medium and its writing with high reliability after long period use and/or high environmental temperature storageTDK CORP·Filed 1999·Granted Nov 28, 2000·59 cites·18 claims
- 1489US7154836B2Optical recording/reproducing method and optical recording mediumTDK CORP·Filed 2003·Granted Dec 26, 2006·27 cites·4 claims
- 1589US7141288B2Optical information recording mediumTDK CORP·Filed 2004·Granted Nov 28, 2006·26 cites·10 claims
- 1689US7136343B2Optical recording/reproducing method and optical recording mediumTDK CORP·Filed 2003·Granted Nov 14, 2006·25 cites·4 claims
- 1789US6996055B2Optical recording medium and method for optically recording data in the sameTDK CORP·Filed 2003·Granted Feb 7, 2006·26 cites·40 claims
- 1887US6030679AOptical recording material and its fabrication methodTDK CORP·Filed 1998·Granted Feb 29, 2000·53 cites·10 claims
- 1987US5577020AMagneto-optical disc with intermediate film layer between a recording film and a dielectric filmTDK CORP·Filed 1994·Granted Nov 19, 1996·40 cites·13 claims
- 2086US6087067AOptical recording mediumTDKCORPORATION·Filed 1998·Granted Jul 11, 2000·48 cites·4 claims
- 2185US7143426B2Multilayer optical recording medium with thickness ranges reducing interlayer cross-talkTDK CORP·Filed 2003·Granted Nov 28, 2006·20 cites·4 claims
- 2285US5965323AMethod for preparing optical recording mediumTDK CORP·Filed 1998·Granted Oct 12, 1999·42 cites·4 claims
- 2383US6103330AOptical recording medium and fabrication method thereforTDK CORP·Filed 1998·Granted Aug 15, 2000·39 cites·4 claims
- 2482US6040030AOptical recording mediumTDK CORP·Filed 1998·Granted Mar 21, 2000·69 cites·12 claims
- 2582US5593789AMagneto-optical recording mediumTDK CORP·Filed 1994·Granted Jan 14, 1997·41 cites·13 claims
- 2681US6677104B2Optical information mediumTDK CORP·Filed 2001·Granted Jan 13, 2004·14 cites·22 claims
- 2778US5700567AMagneto-optical recording mediumTDK CORP·Filed 1995·Granted Dec 23, 1997·30 cites·9 claims
- 2877US6461710B1Optical recording mediumTDK CORP·Filed 1999·Granted Oct 8, 2002·41 cites·17 claims
- 2975US7701838B2Optical information medium including an information bearing surface and a functional layer, and reading methodTDK CORP·Filed 2005·Granted Apr 20, 2010·2 cites·19 claims
- 3075US6449240B1System, method and information medium for storing and reading information as a difference in a surface potential or a surface charge densityTDK CORP·Filed 2000·Granted Sep 10, 2002·10 cites·5 claims
- 3175US6438085B1Optical recording methodTDK CORP·Filed 1999·Granted Aug 20, 2002·26 cites·2 claims
- 3275US6051363AMethod for making an optical recording mediumTDKCORPORATION·Filed 1997·Granted Apr 18, 2000·28 cites·21 claims
- 3375US4849304AOptical recording mediumTDK CORP·Filed 1987·Granted Jul 18, 1989·19 cites·15 claims
- 3474US6169722B1Phase change type optical recording medium having minute length recorded marksTDK CORP·Filed 1999·Granted Jan 2, 2001·24 cites·8 claims
- 3573US6898174B2Optical recording mediumTDK CORP·Filed 2003·Granted May 24, 2005·7 cites·4 claims
- 3671US6999392B2Optical recording method and optical recording mediumTDK CORP·Filed 2001·Granted Feb 14, 2006·8 cites·39 claims
- 3771US6496462B2Optical recording method, optical recording apparatus, and optical recording mediumTDK CORP·Filed 2001·Granted Dec 17, 2002·8 cites·11 claims
- 3871US5552237AMagnetooptical recording mediumTDK CORP·Filed 1993·Granted Sep 3, 1996·33 cites·11 claims
- 3970US6665260B2Optical recording medium including protruding winding parts used as prepitsTDK CORP·Filed 2001·Granted Dec 16, 2003·7 cites·13 claims
- 4070US6495308B2Optical recording method and optical recording mediumTDK CORP·Filed 2001·Granted Dec 17, 2002·7 cites·13 claims
- 4169US7197005B2Optical recording method and mediumTDK CORP·Filed 2001·Granted Mar 27, 2007·7 cites·4 claims
- 4268US6618349B2Optical recording medium and its designing methodTDK CORP·Filed 2001·Granted Sep 9, 2003·6 cites·4 claims
- 4367US6798733B2Optical recording method and mediumTDK CORP·Filed 2001·Granted Sep 28, 2004·6 cites·13 claims
- 4467US6605328B2Optical recording mediumTDK CORP·Filed 2001·Granted Aug 12, 2003·6 cites·18 claims
- 4567US6192024B1Optical recording mediumTDK CORP·Filed 1998·Granted Feb 20, 2001·19 cites·4 claims
- 4667US6115351APhase change optical recording medium and its writing with high reliability after long period use and/or high environmental temperature storageTDK CORP·Filed 1998·Granted Sep 5, 2000·18 cites·12 claims
- 4766US4902584AOptical recording mediumTDK CORP·Filed 1987·Granted Feb 20, 1990·14 cites·11 claims
- 4864US8107349B2Optical head device and optical recording and reading systemKAWANO NORIYUKI·Filed 2009·Granted Jan 31, 2012·1 cites·12 claims
- 4964US7859968B2Information readout method for non mask layer type optical information mediumTDK CORP·Filed 2009·Granted Dec 28, 2010·0 cites·12 claims
- 5063US6249509B1Optical device with protective coverTDK CORP·Filed 1995·Granted Jun 19, 2001·16 cites·7 claims
Showing the top 50 of 91 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →