Inventor · disambiguated record
Masaaki Sakai
Also filed as: SAKAI MASAAKI
54 granted patents·7 pending applications·754 citations·filing 1973–2025
98Inventor score
Top patents by PatentIndex Score
61 records- 0197USD325743SPrinting head for printerCANON KK·Filed 1989·Granted Apr 28, 1992·61 cites·1 claims
- 0297USD259348SCombined desk top electronic calculator and clockCANON KK·Filed 1979·Granted May 26, 1981·43 cites·1 claims
- 0396USD315360SPrinter for computerCANON KK·Filed 1989·Granted Mar 12, 1991·50 cites·1 claims
- 0493US4114358AMethod and apparatus for commencing the yarn forming operation of a fasciated yarnTORAY INDUSTRIES·Filed 1977·Granted Sep 19, 1978·30 cites·17 claims
- 0592US4546020AArtificial fur with guard hair fibers and under fur fibersTORAY INDUSTRIES·Filed 1984·Granted Oct 8, 1985·43 cites·4 claims
- 0691US4729060ACooling system for electronic circuit deviceFUJITSU LTD·Filed 1985·Granted Mar 1, 1988·120 cites·32 claims
- 0791US4415611AArtificial fur having guard hair fibers and under fur fibers and a method for manufacturing the sameTORAY INDUSTRIES·Filed 1981·Granted Nov 15, 1983·57 cites·40 claims
- 0888US9089139B2Agri-horticultural pest control compositions comprising 4-(3-butynyl)aminopyrimidine derivativesSAKAI MASAAKI·Filed 2011·Granted Jul 28, 2015·15 cites·6 claims
- 0987US3992865AMethod and apparatus to start interrupt and stop spinning of a fasciated spun yarnTORAY INDUSTRIES·Filed 1975·Granted Nov 23, 1976·22 cites·27 claims
- 1086US6305666B1Valve seat made of Fe-based sintered alloy excellent in wear resistanceMITSUBISHI MATERIALS CORP·Filed 2000·Granted Oct 23, 2001·20 cites·8 claims
- 1185USD321002SLaser beam printerCANON KK·Filed 1989·Granted Oct 22, 1991·22 cites·1 claims
- 1285US4438377AStop control circuit for brushless DC motorSONY CORP·Filed 1981·Granted Mar 20, 1984·20 cites·15 claims
- 1381US12330904B2Medium conveying apparatus to detect multi-feed based on continuous overlap portionPFU LTD·Filed 2023·Granted Jun 17, 2025·0 cites·7 claims
- 1481US4729215AYarn for manufacturing artificial fursTORAY INDUSTRIES·Filed 1986·Granted Mar 8, 1988·21 cites·31 claims
- 1579US10893160B2Multi-feed detection apparatus for changing a threshold value for detecting multi-feed or stopping detection of multi-feed based on a shape of a mediumPFU LTD·Filed 2019·Granted Jan 12, 2021·2 cites·15 claims
- 1679USD319655SLaser beam printerCANON KK·Filed 1989·Granted Sep 3, 1991·17 cites·1 claims
- 1777US8873111B2Image reading device, image processing method and computer readable mediumSAKAI MASAKAZU·Filed 2012·Granted Oct 28, 2014·7 cites·7 claims
- 1877US5507257AValue guide member formed of Fe-based sintered alloy having excellent wear and abrasion resistanceMITSUBISHI MATERIALS CORP·Filed 1994·Granted Apr 16, 1996·24 cites·4 claims
- 1975USD311526SOpti-magnetic disc cartridgeCANON KK·Filed 1988·Granted Oct 23, 1990·16 cites·1 claims
- 2074US11820624B2Medium conveying apparatus to detect multi-feed based on continuous overlap portionPFU LTD·Filed 2022·Granted Nov 21, 2023·0 cites·17 claims
- 2174USD321001SLaser beam printerCANON KK·Filed 1989·Granted Oct 22, 1991·14 cites·1 claims
- 2274USD319656SLaser beam printerCANON KK·Filed 1989·Granted Sep 3, 1991·14 cites·1 claims
- 2374US4459612AVertical synchronizing signal detecting circuitSONY CORP·Filed 1982·Granted Jul 10, 1984·17 cites·6 claims
- 2473US3937476AReproducing apparatus for a disc type record mediumSONY CORP·Filed 1973·Granted Feb 10, 1976·13 cites·9 claims
- 2573US2024380853A1Medium conveying apparatus for determining whether a conveyed medium is id cardPFU LTD·Filed 2024·Application pending·0 cites
- 2672US4463391AVideo tape editorSONY CORP·Filed 1981·Granted Jul 31, 1984·20 cites·3 claims
- 2772USD261528SDesk top electronic calculatorCANON KK·Filed 1979·Granted Oct 27, 1981·10 cites·1 claims
- 2870US12084305B2Medium conveying apparatus to determine whether overlap detection is valid or invalid based on position of end of mediumPFU LTD·Filed 2022·Granted Sep 10, 2024·0 cites·20 claims
- 2970US11891266B2Medium conveying apparatus to determine whether multi-feed has occurred based on whether outer shape of object area in input image is rectangularPFU LTD·Filed 2022·Granted Feb 6, 2024·0 cites·12 claims
- 3069US12081711B2Medium conveying apparatus for determining whether a conveyed medium is ID cardPFU LTD·Filed 2022·Granted Sep 3, 2024·0 cites·15 claims
- 3168US11807489B2Medium conveying apparatus to change determination threshold for multi-feed of medium according to size of overlap area in mediumPFU LTD·Filed 2022·Granted Nov 7, 2023·0 cites·18 claims
- 3267USD429259SRefrigeratorTOSHIBA KK·Filed 1999·Granted Aug 8, 2000·14 cites·1 claims
- 3367US4040081AAlternating current control circuitsSONY CORP·Filed 1975·Granted Aug 2, 1977·16 cites·6 claims
- 3465US12384173B2Medium conveyance device, control method, and control programPFU LTD·Filed 2020·Granted Aug 12, 2025·0 cites·20 claims
- 3564US12077406B2Medium conveying apparatus to execute abnormality processing for multi-feed based on overlap detection widthPFU LTD·Filed 2022·Granted Sep 3, 2024·0 cites·15 claims
- 3664US11363153B2Medium conveying apparatus for determining whether a conveyed medium is ID cardPFU LTD·Filed 2020·Granted Jun 14, 2022·0 cites·12 claims
- 3764US8586505B24-(3-butynyl)aminopyrimidine derivatives as pest control agents for agricultural and horticultural useSAKAI MASAAKI·Filed 2010·Granted Nov 19, 2013·2 cites·8 claims
- 3864US7754926B2Production process of 3-alkoxy-1-propanols, and 3-alkoxy-1-propanols obtained by the production processSHOWA DENKO KK·Filed 2005·Granted Jul 13, 2010·1 cites·13 claims
- 3961US2024317521A1Media conveying apparatus, control method, and non-transitory recording mediumPFU LTD·Filed 2024·Application pending·0 cites
- 4060US4698703ACapstan servo systemSONY CORP·Filed 1986·Granted Oct 6, 1987·12 cites·13 claims
- 4160US2025373743A1Medium conveying apparatus, image reading apparatus, medium conveying method, and control programPFU LTD·Filed 2025·Application pending·0 cites
- 4258US7553794B2Heteropolyacid and or its salt supported catalyst, production process of the catalyst and production process of compound using the catalystSHOWA DENKO KK·Filed 2003·Granted Jun 30, 2009·3 cites·16 claims
- 4357US11512037B2Process for producing dimethyl 2,3,5,6-tetrachloro-1,4-benzenedicarboxylateSDS BIOTECH CORP·Filed 2021·Granted Nov 29, 2022·0 cites·25 claims
- 4457US2024228209A9Medium conveyance apparatus with a plurality of sound wave sensors driven by single drive signal and outputting sound wave signals at different timingsPFU LTD·Filed 2023·Application pending·0 cites
- 4556US11706855B2Light emitting element driving device for preventing that overcurrent flows through light emitting elementPFU LTD·Filed 2022·Granted Jul 18, 2023·0 cites·6 claims
- 4655US11952238B2Double feeding detection device, control method, and control programPFU LTD·Filed 2019·Granted Apr 9, 2024·0 cites·15 claims
- 4754US12024395B2Medium transport device, control method, and control programPFU LTD·Filed 2019·Granted Jul 2, 2024·0 cites·20 claims
- 4852US11856170B2Medium carrying device, control method, and control programPFU LTD·Filed 2020·Granted Dec 26, 2023·0 cites·16 claims
- 4952USD261146SElectrostatic copier or similar articleMINOLTA CAMERA KK·Filed 1979·Granted Oct 6, 1981·4 cites·1 claims
- 5049US5529407AImage recording apparatusCANON KK·Filed 1994·Granted Jun 25, 1996·9 cites·32 claims
Showing the top 50 of 61 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →