Inventor
NAGAI TAKAHIRO
JP47 patents
⚠️ This page may combine multiple inventors who share the name “NAGAI TAKAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
24 patentsUS5715221AFeb 3, 1998
Method for managing defects in an information recording medium, and a device and information recording medium using said method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD359 citations99
US6938162B1Aug 30, 2005
Optical disk, optical disk recording and reproducing apparatus, method for recording, reproducing and deleting data on optical disk, and information processing system
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD278 citations98
US6134214AOct 17, 2000
Method for substituting defective recording of discoid recording medium and discoid recording medium recording and reproducing device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD82 citations97
US6549499B2Apr 15, 2003
Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD24 citations96
US6351447B1Feb 26, 2002
Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD29 citations96
US6314078B1Nov 6, 2001
Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD40 citations96
US6301220B1Oct 9, 2001
Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD32 citations96
US5872767AFeb 16, 1999
Optical disk and an optical disk recording/reproduction device having address blocks located on boundary lines between adjoining tracks
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD59 citations96
US5862112AJan 19, 1999
Optical disk and an optical disk recording reproduction device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD49 citations96
US6496455B1Dec 17, 2002
Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD21 citations93
US6175549B1Jan 16, 2001
Recording defect substitution method of a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD15 citations93
US6802074B1Oct 5, 2004
Recording apparatus, transmitting apparatus, and computer-readable recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD44 citations92
US6687860B1Feb 3, 2004
Data transfer device and data transfer method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD29 citations92
US7339869B2Mar 4, 2008
Optical disk and optical method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD17 citations84
US7196994B2Mar 27, 2007
Information recording medium, information recording apparatus and information reproduction apparatus for the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74
US7092342B2Aug 15, 2006
Optical disc, recording apparatus and method, and reproduction apparatus and method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74
US7209422B2Apr 24, 2007
Optical disc recording method and optical disc reproducing method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations63
US7164644B2Jan 16, 2007
Optical disc, recording apparatus method, and reproduction apparatus and method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations63
US7136335B2Nov 14, 2006
Information recording medium, recording apparatus, and reproduction apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations63
US7133349B2Nov 7, 2006
Optical disc, recording apparatus and method, and reproduction apparatus and method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations63
USRE38706EFeb 22, 2005
Recording defect substitution method of a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations63
US7298844B2Nov 20, 2007
Recording/reproducing apparatus, data moving method, and data deletion method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations62
USRE39163EJul 11, 2006
Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a disc-shaped recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD0 citations52
USRE38611EOct 5, 2004
Method for substituting defective recording of discoid recording medium and discoid recording medium recording and reproducing device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD0 citations52
PANASONIC CORP
8 patentsUS8347128B2Jan 1, 2013
Data processing device and power control method
PANASONIC CORP11 citations84
US7542568B2Jun 2, 2009
Encryption device a decrypting device a secret key generation device a copyright protection system and a cipher communication device
PANASONIC CORP20 citations84
US7810129B2Oct 5, 2010
Video display apparatus and reproduction apparatus
PANASONIC CORP8 citations79
US7831831B2Nov 9, 2010
Authentication communication system, authentication communication apparatus, and authentication communication method
PANASONIC CORP7 citations74
US8031869B2Oct 4, 2011
Information recording medium, usage management method, and usage management apparatus
PANASONIC CORP4 citations63
US7610626B2Oct 27, 2009
Recording medium, recording apparatus, reading apparatus, and program and method therefore
PANASONIC CORP4 citations63
US7555205B2Jun 30, 2009
Method for controlling defect of optical disk, optical disk recording device, and optical disk reproducing device
PANASONIC CORP2 citations63
US7949762B2May 24, 2011
Address managing method and communication apparatus
PANASONIC CORP5 citations62
MURATA MANUFACTURING CO
8 patentsUS12040850B2Jul 16, 2024
Near-field communication device
MURATA MANUFACTURING CO0 citations52
US12039387B2Jul 16, 2024
IC card and IC card system
MURATA MANUFACTURING CO0 citations52
US12034498B2Jul 9, 2024
Wireless power-receiving device with near field communication function
MURATA MANUFACTURING CO0 citations52
US11995499B2May 28, 2024
IC card and IC card system
MURATA MANUFACTURING CO0 citations52
US11936200B2Mar 19, 2024
Wireless power supply system
MURATA MANUFACTURING CO0 citations52
US11637460B2Apr 25, 2023
Wireless power transfer system having an electric field shield member
MURATA MANUFACTURING CO0 citations52
US12364872B2Jul 22, 2025
Vivo-implantable medical device
MURATA MANUFACTURING CO0 citations49
US12100970B2Sep 24, 2024
Wireless power reception device
MURATA MANUFACTURING CO0 citations49