Inventor · disambiguated record
Takahiro Nagai
Also filed as: NAGAI TAKAHIRO
47 granted patents·15 pending applications·1,178 citations·filing 1996–2025
98Inventor score
Files withMATSUSHITA ELECTRIC INDUSTRIAL CO LTD24MURATA MANUFACTURING CO14PANASONIC CORP10NAGAI TAKAHIRO3NIDEC CORP3
Top patents by PatentIndex Score
62 records- 0199US5715221AMethod for managing defects in an information recording medium, and a device and information recording medium using said methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Feb 3, 1998·359 cites·26 claims
- 0298US6938162B1Optical disk, optical disk recording and reproducing apparatus, method for recording, reproducing and deleting data on optical disk, and information processing systemMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Aug 30, 2005·278 cites·28 claims
- 0397US6134214AMethod for substituting defective recording of discoid recording medium and discoid recording medium recording and reproducing deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Oct 17, 2000·82 cites·4 claims
- 0496US6314078B1Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Nov 6, 2001·40 cites·5 claims
- 0595US6301220B1Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Oct 9, 2001·32 cites·22 claims
- 0694US6351447B1Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Feb 26, 2002·29 cites·2 claims
- 0793US6549499B2Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Apr 15, 2003·24 cites·14 claims
- 0892US6496455B1Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Dec 17, 2002·21 cites·7 claims
- 0991US5872767AOptical disk and an optical disk recording/reproduction device having address blocks located on boundary lines between adjoining tracksMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Feb 16, 1999·59 cites·11 claims
- 1089US5862112AOptical disk and an optical disk recording reproduction deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Jan 19, 1999·49 cites·6 claims
- 1188US6802074B1Recording apparatus, transmitting apparatus, and computer-readable recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Oct 5, 2004·44 cites·12 claims
- 1287US8347128B2Data processing device and power control methodPANASONIC CORP·Filed 2008·Granted Jan 1, 2013·11 cites·18 claims
- 1384US7339869B2Optical disk and optical methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Mar 4, 2008·17 cites·8 claims
- 1480US7164644B2Optical disc, recording apparatus method, and reproduction apparatus and methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2005·Granted Jan 16, 2007·3 cites·21 claims
- 1580US7133349B2Optical disc, recording apparatus and method, and reproduction apparatus and methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2005·Granted Nov 7, 2006·3 cites·19 claims
- 1679US7810129B2Video display apparatus and reproduction apparatusPANASONIC CORP·Filed 2006·Granted Oct 5, 2010·8 cites·14 claims
- 1776US7542568B2Encryption device a decrypting device a secret key generation device a copyright protection system and a cipher communication devicePANASONIC CORP·Filed 2002·Granted Jun 2, 2009·20 cites·25 claims
- 1876US6175549B1Recording defect substitution method of a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Jan 16, 2001·15 cites·3 claims
- 1973US7092342B2Optical disc, recording apparatus and method, and reproduction apparatus and methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Aug 15, 2006·7 cites·17 claims
- 2072US7949762B2Address managing method and communication apparatusPANASONIC CORP·Filed 2006·Granted May 24, 2011·5 cites·5 claims
- 2170US8218029B2Image taking apparatus, correction circuit and correction methodNAGAI TAKAHIRO·Filed 2009·Granted Jul 10, 2012·4 cites·12 claims
- 2270US7196994B2Information recording medium, information recording apparatus and information reproduction apparatus for the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Mar 27, 2007·7 cites·19 claims
- 2369US7831831B2Authentication communication system, authentication communication apparatus, and authentication communication methodPANASONIC CORP·Filed 2003·Granted Nov 9, 2010·7 cites·23 claims
- 2468US2025099368A1Capsule medication device and capsule medication device charging systemMURATA MANUFACTURING CO·Filed 2024·Application pending·0 cites
- 2565US2025233459A1Wireless power receiving deviceMURATA MANUFACTURING CO·Filed 2025·Application pending·0 cites
- 2663US2024396375A1Wireless power receiving deviceMURATA MANUFACTURING CO·Filed 2024·Application pending·0 cites
- 2761US12039387B2IC card and IC card systemMURATA MANUFACTURING CO·Filed 2022·Granted Jul 16, 2024·0 cites·20 claims
- 2861US7136335B2Information recording medium, recording apparatus, and reproduction apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Nov 14, 2006·4 cites·7 claims
- 2961US2024154307A1Short-range wireless communication deviceMURATA MANUFACTURING CO·Filed 2024·Application pending·0 cites
- 3060US12034498B2Wireless power-receiving device with near field communication functionMURATA MANUFACTURING CO·Filed 2022·Granted Jul 9, 2024·0 cites·20 claims
- 3160US11995499B2IC card and IC card systemMURATA MANUFACTURING CO·Filed 2022·Granted May 28, 2024·0 cites·20 claims
- 3260US11262645B2Lens shift mechanism and projection display apparatusSONY CORP·Filed 2019·Granted Mar 1, 2022·0 cites·13 claims
- 3360US9599123B2Blower fanNIDEC CORP·Filed 2013·Granted Mar 21, 2017·1 cites·11 claims
- 3460US7610626B2Recording medium, recording apparatus, reading apparatus, and program and method thereforePANASONIC CORP·Filed 2003·Granted Oct 27, 2009·4 cites·5 claims
- 3559US12364872B2Vivo-implantable medical deviceMURATA MANUFACTURING CO·Filed 2022·Granted Jul 22, 2025·0 cites·20 claims
- 3659US9388827B2Blower fanNIDEC CORP·Filed 2013·Granted Jul 12, 2016·1 cites·19 claims
- 3759US8494344B2Recording and playback apparatusTAKAO NAOYA·Filed 2009·Granted Jul 23, 2013·0 cites·12 claims
- 3858US7209422B2Optical disc recording method and optical disc reproducing methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Apr 24, 2007·3 cites·73 claims
- 3958USRE38706ERecording defect substitution method of a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Feb 22, 2005·3 cites·5 claims
- 4058US2023268776A1Wireless communication charging circuit systemMURATA MANUFACTURING CO·Filed 2023·Application pending·0 cites
- 4157US7298844B2Recording/reproducing apparatus, data moving method, and data deletion methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Nov 20, 2007·3 cites·17 claims
- 4257US2024250428A1Ring-type deviceMURATA MANUFACTURING CO·Filed 2024·Application pending·0 cites
- 4356US12100970B2Wireless power reception deviceMURATA MANUFACTURING CO·Filed 2023·Granted Sep 24, 2024·0 cites·20 claims
- 4456US2008310292A1Optical disk, optical disk recording and reproducing apparatus, method for recording, reproducing and deleting data on optical disk, and information processing systemNAGAI TAKAHIRO·Filed 2008·Application pending·0 cites
- 4555US12040850B2Near-field communication deviceMURATA MANUFACTURING CO·Filed 2022·Granted Jul 16, 2024·0 cites·21 claims
- 4655US8031869B2Information recording medium, usage management method, and usage management apparatusPANASONIC CORP·Filed 2003·Granted Oct 4, 2011·4 cites·8 claims
- 4755US6687860B1Data transfer device and data transfer methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Feb 3, 2004·29 cites·18 claims
- 4854US7555205B2Method for controlling defect of optical disk, optical disk recording device, and optical disk reproducing devicePANASONIC CORP·Filed 2002·Granted Jun 30, 2009·2 cites·23 claims
- 4953US2005185547A1Optical disk, optical disk recording and reproducing apparatus, method for recording, reproducing and deleting data on optical disk, and information processing systemFiled 2005·Application pending·0 cites
- 5052US11936200B2Wireless power supply systemMURATA MANUFACTURING CO·Filed 2021·Granted Mar 19, 2024·0 cites·14 claims
Showing the top 50 of 62 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →