Inventor · disambiguated record
Masao Fujita
Also filed as: FUJITA MASAO · UENO YASUHIKO
44 granted patents·8 pending applications·341 citations·filing 1974–2024
97Inventor score
Top patents by PatentIndex Score
52 records- 0198US9311946B2Magnetic recording mediumTANAKA KENJI·Filed 2011·Granted Apr 12, 2016·124 cites·13 claims
- 0293US9767835B2Magnetic recording mediumHITACHI MAXELL·Filed 2016·Granted Sep 19, 2017·14 cites·2 claims
- 0391US11152711B2Electromagnetic-wave-absorbing sheetMAXELL HOLDINGS LTD·Filed 2017·Granted Oct 19, 2021·4 cites·9 claims
- 0487US6386325B1Elevator system with hall scanner for distinguishing between standing and sitting elevator passengersMITSUBISHI ELECTRIC CORP·Filed 2000·Granted May 14, 2002·28 cites·15 claims
- 0586US11587705B2Electromagnetic wave absorbing composition and electromagnetic wave absorbing bodyMAXELL LTD·Filed 2018·Granted Feb 21, 2023·2 cites·7 claims
- 0684US10716247B2Electromagnetic absorberMAXELL HOLDINGS LTD·Filed 2017·Granted Jul 14, 2020·4 cites·8 claims
- 0783US11477925B2Electromagnetic wave absorbing sheetMAXELL LTD·Filed 2018·Granted Oct 18, 2022·2 cites·8 claims
- 0881US8159776B2Magnetic tape driving apparatus comprising a tape separation portion that separates a magnetic tape from a magnetoresistive head unitFUJITA MASAO·Filed 2008·Granted Apr 17, 2012·5 cites·10 claims
- 0980US7808736B2Servo signal recording apparatus, servo signal recording method, and magnetic tapeHITACHI MAXELL·Filed 2008·Granted Oct 5, 2010·4 cites·5 claims
- 1078US4231240AScrew plug assemblyNISSAN SHATAI KABUSHIKI KAISHA·Filed 1978·Granted Nov 4, 1980·40 cites·6 claims
- 1177US11515643B2Electromagnetic-wave-absorbing sheetMAXELL LTD·Filed 2021·Granted Nov 29, 2022·0 cites·3 claims
- 1277US4045551ASublimable aromatic compositionsOGAWA & CO LTD·Filed 1975·Granted Aug 30, 1977·20 cites·8 claims
- 1377US2025095892A1Electromagnetic wave absorberMAXELL LTD·Filed 2024·Application pending·0 cites
- 1475US5928661AControlled release composition containing volatile compoundRENGO CO LTD·Filed 1997·Granted Jul 27, 1999·24 cites·12 claims
- 1572US8068308B2Servo signal recording apparatus, information recording apparatus, and tracking servo methodFUJITA MASAO·Filed 2009·Granted Nov 29, 2011·2 cites·8 claims
- 1669US8027115B2Data recording apparatus for recording a data signal onto a magnetic recording medium and data recording system using the data recording apparatusHITACHI MAXELL·Filed 2008·Granted Sep 27, 2011·2 cites·4 claims
- 1769US7701655B2Servo signal recording method, servo signal recording apparatus, and magnetic recording mediumHITACHI MAXELL·Filed 2008·Granted Apr 20, 2010·1 cites·7 claims
- 1868US4123525ASublimable insecticidal compositions containing triisopropyl- or tritertiary-butyl-s-trioxane carriersOGAWA & CO LTD·Filed 1976·Granted Oct 31, 1978·7 cites·20 claims
- 1964US8383526B2Sheet for total heat exchangerRENGO CO LTD·Filed 2007·Granted Feb 26, 2013·2 cites·4 claims
- 2064US4353530AMethod and apparatus for automatically punching the tuyeres of a converterNIPPON MINING CO·Filed 1980·Granted Oct 12, 1982·9 cites·5 claims
- 2163US8593754B2Magnetic tape driving apparatus having a head displacing portionFUJITA MASAO·Filed 2011·Granted Nov 26, 2013·1 cites·5 claims
- 2262US11100948B2Coating-type magnetic recording medium for heat-assisted recording, and heat-assisted magnetic recording apparatus and heat-assisted magnetic recording method using the sameMAXELL HOLDINGS LTD·Filed 2019·Granted Aug 24, 2021·1 cites·11 claims
- 2359US7994344B2Intermediates for the production of optically active cyclopropylamine derivatives and process for the production of the intermediatesDAIICHI SANKYO CO LTD·Filed 2009·Granted Aug 9, 2011·0 cites·20 claims
- 2457US12176131B2Electromagnetic wave absorberMAXELL LTD·Filed 2019·Granted Dec 24, 2024·0 cites·8 claims
- 2557US8130463B2Data recording apparatus and data recording methodFUJITA MASAO·Filed 2008·Granted Mar 6, 2012·0 cites·7 claims
- 2657US4214892ASublimable herbicidal compositions containing triisopropyl-or tritertiary-butyl-s-trioxane carriersOGAWA & CO LTD·Filed 1978·Granted Jul 29, 1980·4 cites·11 claims
- 2757US4210640ASublimable fungicidal compositions containing triisopropyl- or tritertiary-butyl-s-trioxane carriersOGAWA & CO LTD·Filed 1978·Granted Jul 1, 1980·4 cites·8 claims
- 2855US8081559B2Recording and reproducing apparatus and recording mediumFUJITA MASAO·Filed 2007·Granted Dec 20, 2011·0 cites·7 claims
- 2952US2014371457A1Process for production of quinuclidine compoundsDAIICHI SANKYO CO LTD·Filed 2014·Application pending·0 cites
- 3051US7569599B2Intermediates for the production of optically active cyclopropylamine derivatives and process for the production of the intermediatesDAIICHI SEIYAKU CO·Filed 2004·Granted Aug 4, 2009·0 cites·15 claims
- 3149US6403021B1Method of constructing a blast furnace body and lifting transfer apparatusKAWASAKI STEEL CO·Filed 2000·Granted Jun 11, 2002·1 cites·9 claims
- 3247US12019110B2Measurement system and radio wave blocking unitMAXELL LTD·Filed 2020·Granted Jun 25, 2024·0 cites·17 claims
- 3346US12349328B2Electric-wave absorber and manufacturing method for electric-wave absorberMAXELL LTD·Filed 2022·Granted Jul 1, 2025·0 cites·8 claims
- 3444US5616166ATapping method for blast furnaceKAWASAKI STEEL CO·Filed 1994·Granted Apr 1, 1997·5 cites·13 claims
- 3543US11804659B2Electromagnetic wave absorbing composition, and electromagnetic wave absorption bodyMAXELL LTD·Filed 2018·Granted Oct 31, 2023·0 cites·5 claims
- 3643US7401684B2Automatic announcing device for an elevatorMITSUBISHI ELECTRIC CORP·Filed 2004·Granted Jul 22, 2008·1 cites·4 claims
- 3743US4351561ALocking device for an openable automobile roofNISSAN MOTOR·Filed 1980·Granted Sep 28, 1982·8 cites·4 claims
- 3843US3981889AMethod of manufacturing cis,cis-2,4,6-triisopropyl-1,3,5-trioxaneOGAWA & CO LTD·Filed 1974·Granted Sep 21, 1976·2 cites·2 claims
- 3943US2025183545A1Radio wave reflectorNAT INST INF & COMM TECH·Filed 2023·Application pending·0 cites
- 4042US10861487B2High recording density magnetic recording medium and recording/reproduction mechanism for the sameMAXELL HOLDINGS LTD·Filed 2018·Granted Dec 8, 2020·0 cites·8 claims
- 4141US5880150AAntimicrobial agent containing allyl isothiocyanate and method for controlling release speed of allyl isothiocyanateGREEN CROSS CORP·Filed 1994·Granted Mar 9, 1999·10 cites·20 claims
- 4241US2013060036A1Process for production of quinuclidine compoundsKITAGAWA YUTAKA·Filed 2010·Application pending·0 cites
- 4340US2008123102A1Apparatus and method for measuring spacingHITACHI MAXELL·Filed 2007·Application pending·0 cites
- 4440US2020008328A1Electromagnetic-wave absorbing sheetMAXELL HOLDINGS LTD·Filed 2018·Application pending·0 cites
- 4539US10614847B2Magnetic recording mediumMAXELL HOLDINGS LTD·Filed 2017·Granted Apr 7, 2020·0 cites·7 claims
- 4639US2020267877A1Electromagnetic wave absorption sheetMAXELL HOLDINGS LTD·Filed 2017·Application pending·0 cites
- 4733US6479011B2Method of scrapping furnace bottom section of blast furnaceKAWASAKI STEEL CO·Filed 2000·Granted Nov 12, 2002·0 cites·14 claims
- 4833US4303229AMechanical punching device for punching the tuyeres of a converterNIPPON MINING CO·Filed 1980·Granted Dec 1, 1981·3 cites·4 claims
- 4933US2019215994A1Electric wave absorption sheetMAXELL HOLDINGS LTD·Filed 2017·Application pending·0 cites
- 5031US6124219AFunctional material containing volatile agentRENGO CO LTD·Filed 1998·Granted Sep 26, 2000·4 cites·19 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Masao Fujita files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →