Inventor · disambiguated record
Toshimasa Kamisada
Also filed as: KAMISADA TOSHIMASA
21 granted patents·4 pending applications·140 citations·filing 1986–2019
94Inventor score
Files withHITACHI LTD11HITACHI MEDIA ELECTRON KK7HITACHI-LG DATA STORAGE INC3HIROTSUNE AKEMI1KAWAMURA TOMOTO1
Top patents by PatentIndex Score
25 records- 0188US4742218AFocus error detection apparatus utilizing focusing an front and rear sides of focal planesHITACHI LTD·Filed 1986·Granted May 3, 1988·44 cites·13 claims
- 0286US7567495B2Optical pickup apparatus and optical disc apparatus using sameHITACHI MEDIA ELECTRON KK·Filed 2007·Granted Jul 28, 2009·5 cites·3 claims
- 0383US10838063B2Distance measurement apparatus and angle adjustment method of the sameHITACHI LG DATA STORAGE INC·Filed 2018·Granted Nov 17, 2020·5 cites·3 claims
- 0482US7076791B2Optical pickup and optical disc apparatus provided with the sameHITACHI LTD·Filed 2002·Granted Jul 11, 2006·15 cites·8 claims
- 0578US7542396B2Information recording apparatus, information recording medium and information recording mediumHITACHI LTD·Filed 2005·Granted Jun 2, 2009·4 cites·14 claims
- 0674US7379397B2Optical pickup and optical disc apparatus provided with the sameHITACHI LTD·Filed 2006·Granted May 27, 2008·2 cites·4 claims
- 0771US11531102B2Distance measurement image pickup apparatusHITACHI LG DATA STORAGE INC·Filed 2019·Granted Dec 20, 2022·1 cites·5 claims
- 0868US10614584B2Three-dimensional distance measurement apparatusHITACHI LG DATA STORAGE INC·Filed 2018·Granted Apr 7, 2020·1 cites·5 claims
- 0966US7245574B2Optical head and its adjusting method and optical disk device using the sameHITACHI LTD·Filed 2002·Granted Jul 17, 2007·7 cites·4 claims
- 1065US8169880B2Optical pickup having radially arranged lenses in a low profile constructionKAWAMURA TOMOTO·Filed 2011·Granted May 1, 2012·1 cites·6 claims
- 1165US7978587B2Optical pickup apparatus and optical disc apparatus with a single beam systemHITACHI MEDIA ELECTRON KK·Filed 2009·Granted Jul 12, 2011·0 cites·10 claims
- 1263US4841509AApparatus and method for detecting focus error signal and tracking error signal in an optical disk systemHITACHI LTD·Filed 1986·Granted Jun 20, 1989·13 cites·3 claims
- 1362US7940630B2Optical pick up apparatus with a single beam system and having a diffraction gratingHITACHI MEDIA ELECTRON KK·Filed 2007·Granted May 10, 2011·0 cites·10 claims
- 1462US5555539AMulti-beam split-type optical head for use in optical disk apparatusHITACHI LTD·Filed 1994·Granted Sep 10, 1996·14 cites·10 claims
- 1561US7885166B2Optical pick up apparatus with a single beam system and having a diffraction gratingHITACHI MEDIA ELECTRON KK·Filed 2007·Granted Feb 8, 2011·0 cites·8 claims
- 1659US7733760B2Optical pickup having radially arranged lenses in a low profile constructionHITACHI MEDIA ELECTRON KK·Filed 2007·Granted Jun 8, 2010·0 cites·7 claims
- 1757US5060213ASeparation type optical headHITACHI LTD·Filed 1989·Granted Oct 22, 1991·10 cites·13 claims
- 1855US5668786AMagneto-optic disk apparatus having means for eliminating fluctuation component in reproduction magneto-optic signalHITACHI LTD·Filed 1996·Granted Sep 16, 1997·11 cites·12 claims
- 1951US8014258B2Optical pickup having radially arranged lenses in a low profile constructionHITACHI MEDIA ELECTRON KK·Filed 2010·Granted Sep 6, 2011·0 cites·7 claims
- 2051US2008198730A1Optical head and apparatus for optically recording and reproducing informationHITACHI MEDIA ELECTRON KK·Filed 2008·Application pending·0 cites
- 2147US6985424B1Laser module and optical headHITACHI LTD·Filed 1999·Granted Jan 10, 2006·7 cites·11 claims
- 2246US8154962B2Optical pickup and optical information recording and reproducing deviceMORI HIROMITSU·Filed 2007·Granted Apr 10, 2012·0 cites·11 claims
- 2346US2004252221A1Video camera using optical discFiled 2004·Application pending·0 cites
- 2443US2006103759A1Disk video cameraHITACHI LTD·Filed 2005·Application pending·0 cites
- 2541US2005276211A1Information recording medium and manufacturing processHIROTSUNE AKEMI·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →