Inventor · disambiguated record
Keikichi Andoo
Also filed as: ANDOO KEIKICHI
37 granted patents·1 pending application·614 citations·filing 1983–2008
98Inventor score
Files withHITACHI LTD37
Top patents by PatentIndex Score
38 records- 0198US6236635B1Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 1998·Granted May 22, 2001·93 cites·3 claims
- 0297US7012871B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2004·Granted Mar 14, 2006·40 cites·2 claims
- 0394US6529467B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2001·Granted Mar 4, 2003·25 cites·5 claims
- 0494US6343056B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2001·Granted Jan 29, 2002·23 cites·8 claims
- 0591US6231945B1Information recording mediumHITACHI LTD·Filed 1998·Granted May 15, 2001·50 cites·27 claims
- 0690US4984231AOptical information phase change recording medium having double protective layerHITACHI LTD·Filed 1988·Granted Jan 8, 1991·42 cites·20 claims
- 0787US6709801B2Information recording mediumHITACHI LTD·Filed 2001·Granted Mar 23, 2004·25 cites·6 claims
- 0885US6340555B1Information recording medium and information recording and reproducing apparatus using the sameHITACHI LTD·Filed 2000·Granted Jan 22, 2002·17 cites·24 claims
- 0984US7907490B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2008·Granted Mar 15, 2011·2 cites·1 claims
- 1084US6723411B2Information recording medium and method for manufacturing an information recording mediumHITACHI LTD·Filed 2002·Granted Apr 20, 2004·17 cites·12 claims
- 1183US6608806B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2002·Granted Aug 19, 2003·8 cites·3 claims
- 1282US6775226B1Optical recording medium having a plurality of interference layers of different refractive indexHITACHI LTD·Filed 2001·Granted Aug 10, 2004·16 cites·13 claims
- 1380US5368986AInformation recording media, manufacturing method for the same, and information recording methodHITACHI LTD·Filed 1992·Granted Nov 29, 1994·50 cites·8 claims
- 1478US6703098B2Information recording medium and method for manufacturing information recording mediumHITACHI LTD·Filed 2002·Granted Mar 9, 2004·20 cites·4 claims
- 1576US5835469AHigh-density information recording/reproducing methodHITACHI LTD·Filed 1995·Granted Nov 10, 1998·24 cites·10 claims
- 1671US6312779B1Information recording medium and information recording/reproducing apparatusHITACHI LTD·Filed 1999·Granted Nov 6, 2001·40 cites·12 claims
- 1771US6132932AInformation recording medium and information recording and reproducing apparatus using the sameHITACHI LTD·Filed 1997·Granted Oct 17, 2000·18 cites·5 claims
- 1869US6783832B2Information recording mediumHITACHI LTD·Filed 2002·Granted Aug 31, 2004·7 cites·19 claims
- 1969US5257256ARecording waveform for mark-length modulation optical recordingHITACHI LTD·Filed 1991·Granted Oct 26, 1993·18 cites·22 claims
- 2068US7911910B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2008·Granted Mar 22, 2011·0 cites·1 claims
- 2168US7907491B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2008·Granted Mar 15, 2011·0 cites·1 claims
- 2268US5886969AHigh-density information recording/reproducing methodHITACHI LTD·Filed 1997·Granted Mar 23, 1999·17 cites·7 claims
- 2367US7852727B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2008·Granted Dec 14, 2010·0 cites·2 claims
- 2467US7684301B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2008·Granted Mar 23, 2010·0 cites·3 claims
- 2566US6436504B2Information recording mediumHITACHI LTD·Filed 2001·Granted Aug 20, 2002·8 cites·20 claims
- 2661US7417933B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2005·Granted Aug 26, 2008·0 cites·2 claims
- 2761US7042823B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2005·Granted May 9, 2006·0 cites·3 claims
- 2860US6842415B2Information recording method and apparatus with suppressed mark edge jittersHITACHI LTD·Filed 2003·Granted Jan 11, 2005·1 cites·1 claims
- 2957US5038338ARecording waveform for mark-length modulation optical recordingHITACHI LTD·Filed 1990·Granted Aug 6, 1991·11 cites·10 claims
- 3054US6740382B2Information recording mediumHITACHI LTD·Filed 2002·Granted May 25, 2004·1 cites·6 claims
- 3154US5462811AMagneto-optical recording media and mangeto-optical device using the mediaHITACHI LTD·Filed 1992·Granted Oct 31, 1995·9 cites·14 claims
- 3252US5084857AInformation recording method using a modulated recording beam at high, intermediate and low power levelsHITACHI LTD·Filed 1989·Granted Jan 28, 1992·8 cites·9 claims
- 3347US4622264AGarnet film for magnetic bubble memory elementHITACHI LTD·Filed 1983·Granted Nov 11, 1986·7 cites·6 claims
- 3444US7041430B2Information recording media, manufacturing technique and information recording methodHITACHI LTD·Filed 2002·Granted May 9, 2006·5 cites·12 claims
- 3543US4982396AInformation recording medium and apparatus using reversible phase changeHITACHI LTD·Filed 1988·Granted Jan 1, 1991·5 cites·39 claims
- 3643US2002015914A1Information recording medium and information recording and reproducing apparatus using the sameFiled 2001·Application pending·0 cites
- 3740US5263015AMagneto-optical recording media and overwrite recording method using the sameHITACHI LTD·Filed 1991·Granted Nov 16, 1993·4 cites·12 claims
- 3838US5434844AMagneto-optical recording media and magneto-optical recording device using the sameHITACHI LTD·Filed 1993·Granted Jul 18, 1995·3 cites·9 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →