Inventor · disambiguated record
Keiji Nagayama
Also filed as: NAGAYAMA KEIJI
12 granted patents·7 pending applications·225 citations·filing 1976–2008
90Inventor score
Top patents by PatentIndex Score
19 records- 0192US6876612B2Information recording apparatus and methodHITACHI LTD·Filed 2001·Granted Apr 5, 2005·38 cites·15 claims
- 0291US6226449B1Apparatus for recording and reproducing digital image and speechHITACHI LTD·Filed 1997·Granted May 1, 2001·124 cites·31 claims
- 0386US6445654B1Recording/reproducing method and device with supplementary data storage and outputHITACHI LTD·Filed 2000·Granted Sep 3, 2002·25 cites·12 claims
- 0475US7106954B2Digital camcorderHITACHI LTD·Filed 2001·Granted Sep 12, 2006·10 cites·65 claims
- 0565US4085034AMethod for the thermal cracking of heavy hydrocarbonKUREHA CHEMICAL IND CO LTD·Filed 1976·Granted Apr 18, 1978·16 cites·3 claims
- 0662US8270816B2Information recording and/or playback apparatusMIZUSHIMA TOSHIYA·Filed 2007·Granted Sep 18, 2012·4 cites·6 claims
- 0755US2008212953A1Optical Disc Recording/Reproducing ApparatusHITACHI LTD·Filed 2008·Application pending·0 cites
- 0854US8009536B2Recording and reproducing apparatusHITACHI LTD·Filed 2007·Granted Aug 30, 2011·0 cites·8 claims
- 0953US7193946B2Information recording apparatus and methodHITACHI LTD·Filed 2005·Granted Mar 20, 2007·0 cites·7 claims
- 1052US8224151B2Apparatus for recording and reproducing digital image and speechINOUE HISASHI·Filed 2006·Granted Jul 17, 2012·0 cites·28 claims
- 1146US2007122114A1Recording apparatus for initializing recording mediaHITACHI LTD·Filed 2006·Application pending·0 cites
- 1245US2006077265A1Picture management method, picture management apparatus, picture management systemMATSUMOTO TETSUYA·Filed 2005·Application pending·0 cites
- 1343US2007274682A1Image processing apparatusHITACHI LTD·Filed 2007·Application pending·0 cites
- 1442US2008134037A1Recording and reproducing deviceFUJIMOTO MASAHIRO·Filed 2007·Application pending·0 cites
- 1541US4147753AApparatus for the thermal cracking of heavy hydrocarbonKUREHA CHEMICAL IND CO LTD·Filed 1977·Granted Apr 3, 1979·6 cites·4 claims
- 1641US2003152365A1Optical disc recording/reproducing apparatusHITACHI LTD·Filed 2002·Application pending·0 cites
- 1739US2007292104A1Video Recording and Reproducing ApparatusKATANO YUICHI·Filed 2007·Application pending·0 cites
- 1835US7885515B2Recording/reproducing device and recording/reproduction methodHITACHI LTD·Filed 2003·Granted Feb 8, 2011·0 cites·2 claims
- 1930US4077258AMethod of determining liquid level in a petroleum cracking reactorSUZUKI SEIICHI·Filed 1976·Granted Mar 7, 1978·2 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →