Inventor · disambiguated record
Masayuki Sakai
Also filed as: NAKATANI YOSHIHIKO · SAKAI MASAYUKI
123 granted patents·11 pending applications·1,751 citations·filing 1979–2024
99Inventor score
Files withFUJIFILM CORP41CANON KK13MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12FUJI PHOTO FILM CO LTD11MITSUBISHI ELECTRIC CORP11
Top patents by PatentIndex Score
134 records- 0198US4668752ALinear ethylene copolymerMITSUI PETROCHEMICAL IND·Filed 1984·Granted May 26, 1987·196 cites·4 claims
- 0297USD865845SCameraFUJIFILM CORP·Filed 2018·Granted Nov 5, 2019·66 cites·1 claims
- 0396US5573820AProcess for preparing polyesterMITSUI PETROCHEMICAL IND·Filed 1994·Granted Nov 12, 1996·124 cites·24 claims
- 0495US11846897B2Image forming apparatus having toner replenishmentCANON KK·Filed 2022·Granted Dec 19, 2023·2 cites·20 claims
- 0594US7641833B2Method for producing a pellet from a fiber-filled resin composition and injection-molded products thereofPOLYPLASTICS CO·Filed 2005·Granted Jan 5, 2010·25 cites·7 claims
- 0694US6346070B1Catalyst for polyester production, process for producing polyester using the catalyst, polyester obtained by the process, and uses of the polyesterMITSUI CHEMICALS INC·Filed 1999·Granted Feb 12, 2002·89 cites·20 claims
- 0792US7897083B2Method for manufacturing liquid crystalline resin composition of reduced densityPOLYPLASTICS CO·Filed 2005·Granted Mar 1, 2011·19 cites·9 claims
- 0892US6451959B1Catalyst for polyester production, process for producing polyester using the catalyst, polyester obtained by the process, and uses of the polyesterMITSUI CHEMICALS INC·Filed 2001·Granted Sep 17, 2002·53 cites·56 claims
- 0991USD1013008SInstant cameraFUJIFILM CORP·Filed 2021·Granted Jan 30, 2024·13 cites·1 claims
- 1090USD509790SBattery charger for electronic cameraFUJI PHOTO FILM CO LTD·Filed 2004·Granted Sep 20, 2005·39 cites·1 claims
- 1189US10642129B2Digital camera including printerFUJIFILM CORP·Filed 2019·Granted May 5, 2020·4 cites·15 claims
- 1288US6429280B1Process for preparing polyhydroxycarboxylic acidMITSUI CHEMICALS INC·Filed 2000·Granted Aug 6, 2002·36 cites·21 claims
- 1388US6140458APreparation process of polyesterMITSUI CHEMICALS INC·Filed 1999·Granted Oct 31, 2000·50 cites·32 claims
- 1487US4717584AMethod of manufacturing a magnetic thin filmMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1986·Granted Jan 5, 1988·38 cites·11 claims
- 1586USD707746SInstant cameraSAKAI MASAYUKI·Filed 2012·Granted Jun 24, 2014·33 cites·1 claims
- 1686US5241046AProcess for treatment of polyethylene terephthalate, polyethylene terephthalate for molding purposes and process for preparation thereofMITSUI PETROCHEMICAL IND·Filed 1992·Granted Aug 31, 1993·35 cites·6 claims
- 1784USD827014SCameraFUJIFILM CORP·Filed 2017·Granted Aug 28, 2018·23 cites·1 claims
- 1884US6417266B1Process for preparing aliphatic polyesterMITSUI CHEMICALS INC·Filed 2000·Granted Jul 9, 2002·21 cites·14 claims
- 1983USD727990SDigital cameraFUJIFILM CORP·Filed 2013·Granted Apr 28, 2015·26 cites·1 claims
- 2081US9606487B2Optical apparatus and image forming apparatus including the optical apparatusCANON KK·Filed 2015·Granted Mar 28, 2017·2 cites·15 claims
- 2181USD777233SDigital cameraFUJIFILM CORP·Filed 2015·Granted Jan 24, 2017·20 cites·1 claims
- 2281USD512372SBattery charger and data storage apparatus for electronic camerasFUJI PHOTO FILM CO LTD·Filed 2004·Granted Dec 6, 2005·25 cites·1 claims
- 2381US5864169ASemiconductor device including plated heat sink and airbridge for heat dissipationMITSUBISHI ELECTRIC CORP·Filed 1995·Granted Jan 26, 1999·65 cites·19 claims
- 2481US5304511AProduction method of T-shaped gate electrode in semiconductor deviceMITSUBISHI ELECTRIC CORP·Filed 1993·Granted Apr 19, 1994·48 cites·6 claims
- 2581USD310517SPortable computerMITSUBISHI ELECTRIC CORP·Filed 1987·Granted Sep 11, 1990·20 cites·1 claims
- 2680US4241019ACombustible gas detecting elementMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1979·Granted Dec 23, 1980·29 cites·2 claims
- 2777US12099323B2Power supply apparatus for supplying various voltages and image forming apparatus operating on voltage supplied from power supply apparatusCANON KK·Filed 2023·Granted Sep 24, 2024·0 cites·18 claims
- 2877US6320014B1Polyester pelletsMITSUI CHEMICALS INC·Filed 1999·Granted Nov 20, 2001·29 cites·7 claims
- 2976US5358885AMethod of manufacturing a field effect transistor with a T-shaped gate electrode and reduced capacitanceMITSUBISHI ELECTRIC CORP·Filed 1993·Granted Oct 25, 1994·41 cites·5 claims
- 3075USD832908SDigital cameraFUJIFILM CORP·Filed 2017·Granted Nov 6, 2018·14 cites·1 claims
- 3175US9855751B2Method for manufacturing liquid ejecting headSEIKO EPSON CORP·Filed 2014·Granted Jan 2, 2018·2 cites·4 claims
- 3275US4685948AMold for press-molding glass optical elements and a molding method using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1986·Granted Aug 11, 1987·49 cites·15 claims
- 3374US9258448B2Overhead scanner, image obtaining method, and computer-readable recording mediumPFU LTD·Filed 2014·Granted Feb 9, 2016·2 cites·20 claims
- 3474USD706329SElectronic cameraSAKAI MASAYUKI·Filed 2012·Granted Jun 3, 2014·19 cites·1 claims
- 3574USD534061SHolder for electronic camerasFUJI PHOTO FILM CO LTD·Filed 2004·Granted Dec 26, 2006·18 cites·1 claims
- 3673US12332584B2Image forming apparatus having toner replenishmentCANON KK·Filed 2023·Granted Jun 17, 2025·0 cites·7 claims
- 3773USD640300SElectronic cameraFUJIFILM CORP·Filed 2010·Granted Jun 21, 2011·18 cites·1 claims
- 3873US6528617B1Process for producing aliphatic polyester excellent in stabilityMITSUI CHEMICALS INC·Filed 1999·Granted Mar 4, 2003·25 cites·17 claims
- 3971USD855683SStrobe for cameraFUJIFILM CORP·Filed 2017·Granted Aug 6, 2019·12 cites·1 claims
- 4071US8794951B2Mold for resin molding, method for manufacturing mold for resin molding, and resin molded productYONESHIMA SADAYUKI·Filed 2007·Granted Aug 5, 2014·6 cites·13 claims
- 4171US5270444AProcess for treatment of polyethylene terephthalate, polyethylene terephthalate for molding purposes and process for preparation thereofMITSUI PETROCHEMICAL IND·Filed 1993·Granted Dec 14, 1993·17 cites·4 claims
- 4270US12355925B2Digital camera with printerFUJIFILM CORP·Filed 2024·Granted Jul 8, 2025·0 cites·17 claims
- 4369US12413129B2Magnetic geared electrical machine and power generation system using the sameMITSUBISHI HEAVY IND LTD·Filed 2022·Granted Sep 9, 2025·0 cites·15 claims
- 4469US11841666B2Power supply apparatus for supplying various voltages and image forming apparatus operating on voltage supplied from power supply apparatusCANON KK·Filed 2022·Granted Dec 12, 2023·0 cites·20 claims
- 4569US7483076B2Portable electronics device support systemFUJIFILM CORP·Filed 2005·Granted Jan 27, 2009·2 cites·14 claims
- 4668US4356965AHeater with adjustable mix regulating damper for bilevel operationTOYOTA MOTOR CO LTD·Filed 1980·Granted Nov 2, 1982·23 cites·6 claims
- 4767USD880563SCameraFUJIFILM CORP·Filed 2018·Granted Apr 7, 2020·9 cites·1 claims
- 4867USD550736SElectronic cameraFUJIFILM CORP·Filed 2006·Granted Sep 11, 2007·15 cites·1 claims
- 4966US6613259B2Process of making polyester pelletsMITSUI CHEMICALS INC·Filed 2001·Granted Sep 2, 2003·6 cites·7 claims
- 5066US4939333AElectric apparatus with a controlled turntableSANYO ELECTRIC CO·Filed 1989·Granted Jul 3, 1990·20 cites·11 claims
Showing the top 50 of 134 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Masayuki Sakai 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 →