P

Inventor

IWANAGA TOSHIAKI

JP25 patents
⚠️ This page may combine multiple inventors who share the name “IWANAGA TOSHIAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NEC CORP

17 patents
US6861965B2Mar 1, 2005

Code modulating method and code modulating apparatus, demodulating method and demodulating apparatus, and information recording medium

NEC CORP21 citations92
US6459661B1Oct 1, 2002

Optical disk and optical disk device

NEC CORP35 citations92
US4951274AAug 21, 1990

Magneto-optical head capable of separating beams for reading recorded information and servo information by use of one optical element

NEC CORP44 citations92
US7489620B2Feb 10, 2009

Optical information recording and reproducing medium

NEC CORP15 citations83
US7295500B2Nov 13, 2007

Recording condition setting method and information recorder using same

NEC CORP15 citations79
US6108293AAug 22, 2000

Gain control of a reproduced signal amplifier for precise monitoring of a reproduced signal during recording

NEC CORP7 citations74
US5889744AMar 30, 1999

Magneto-optical disk recording device and capable of verifying recorded state during recording and checking erased state during erasing

NEC CORP10 citations74
US5883868AMar 16, 1999

Magneto-optical disk recording device capable of checking erased state during erasing

NEC CORP8 citations74
US5708639AJan 13, 1998

Magneto-optical disk recording device capable of verifying recorded state during recording and checking erased state during erasing

NEC CORP11 citations74
US5689487ANov 18, 1997

Verify-while-recording device for optical disk recording apparatus

NEC CORP10 citations74
US7636287B2Dec 22, 2009

Reproduced signal equalizing method for optical information media and optical information reproducing/recording apparatus

NEC CORP6 citations63
US7414955B2Aug 19, 2008

Optical disc and recording/producing method therefor

NEC CORP5 citations63
US6643234B2Nov 4, 2003

Optical disk device

NEC CORP2 citations63
US6621774B2Sep 16, 2003

Optical disk device

NEC CORP4 citations63
US5751677AMay 12, 1998

Magnetio optical disk recording device capable of verifying recorded state during recording and checking erased state during erasing

NEC CORP2 citations63
US7355957B2Apr 8, 2008

Optical disc medium having a system information recording area of low recording density

NEC CORP6 citations62
US7196984B2Mar 27, 2007

Optical disk medium and optical disk recording and reproducing apparatus

NEC CORP6 citations61

YASKAWA DENKI SEISAKUSHO KK

4 patents

TOSHIBA KK

3 patents

KAWASAKI RAILCAR MFG CO LTD

1 patent