Inventor
NIIHARA TOSHIO
JP23 patents
⚠️ This page may combine multiple inventors who share the name “NIIHARA TOSHIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
22 patentsUS5959943ASep 28, 1999
Information recording medium with clock information therein
HITACHI LTD69 citations96
US5270987ADec 14, 1993
Magneto-optical recording and reproducing method, magneto-optical memory apparatus and magneto-optical recording medium therefor
HITACHI LTD22 citations93
US4743491AMay 10, 1988
Perpendicular magnetic recording medium and fabrication method therefor
HITACHI LTD46 citations92
US4571650AFeb 18, 1986
Magneto-optic information storage system utilizing a self-coupled laser
HITACHI LTD28 citations92
US6493297B1Dec 10, 2002
Multibeam optical disk record and reproduction apparatus and method
HITACHI LTD18 citations84
US6200673B1Mar 13, 2001
Magneto-optical recording medium
HITACHI LTD15 citations84
US5170383ADec 8, 1992
Magneto-optical data recording system
HITACHI LTD13 citations82
US4672594AJun 9, 1987
Magneto-optical recording system utilizing a leakage magnetic field of focusing actuator
HITACHI LTD20 citations82
US5914198AJun 22, 1999
Magneto-optical recording medium having dielectric layers with different indices of refraction
HITACHI LTD14 citations74
US5886958AMar 23, 1999
Information recording apparatus and method for modulated magneto-optical recording medium
HITACHI LTD3 citations74
US5726955AMar 10, 1998
Magneto optical recording medium apparatus and method utilizing light pulse magnetic modulation recording
HITACHI LTD4 citations74
US5473581ADec 5, 1995
Magneto-optical data recording system continuously irradiating optical pulsers
HITACHI LTD7 citations74
US5462811AOct 31, 1995
Magneto-optical recording media and mangeto-optical device using the media
HITACHI LTD9 citations74
US5321672AJun 14, 1994
Method of an apparatus for magneto-optically recording information by changing the position or shape or controlling the diameter of reversed domains
HITACHI LTD11 citations74
US4889757ADec 26, 1989
Optical recording disk
HITACHI LTD12 citations74
US5654058AAug 5, 1997
Magneto-optical disk
HITACHI LTD11 citations73
US4923765AMay 8, 1990
Magneto-optical recording medium
HITACHI LTD7 citations73
US4880694ANov 14, 1989
Magneto-optical recording material
HITACHI LTD7 citations73
US5579292ANov 26, 1996
Magneto-optical data recording apparatus using a sample-servo system for applying heating pulses to record data
HITACHI LTD2 citations63
US5434844AJul 18, 1995
Magneto-optical recording media and magneto-optical recording device using the same
HITACHI LTD3 citations63
US5263015ANov 16, 1993
Magneto-optical recording media and overwrite recording method using the same
HITACHI LTD4 citations63
US5179546AJan 12, 1993
Magneto-optical disk and process for manufacturing the same
HITACHI LTD5 citations63