Inventor · disambiguated record
Masaki Ohura
Also filed as: OHURA MASAKI
29 granted patents·847 citations·filing 1982–2001
98Inventor score
Files withHITACHI LTD29
Top patents by PatentIndex Score
29 records- 0195US5202810AMagnetic disk having an improved surface configurationHITACHI LTD·Filed 1990·Granted Apr 13, 1993·76 cites·14 claims
- 0295US4833020AMagnetic recording mediumHITACHI LTD·Filed 1988·Granted May 23, 1989·77 cites·30 claims
- 0393US5147732ALongitudinal magnetic recording media and magnetic memory unitsHITACHI LTD·Filed 1989·Granted Sep 15, 1992·96 cites·34 claims
- 0491US5143794AMagnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatusHITACHI LTD·Filed 1989·Granted Sep 1, 1992·49 cites·8 claims
- 0591US4556925AMagnetoresistive headHITACHI LTD·Filed 1982·Granted Dec 3, 1985·45 cites·20 claims
- 0690US5750230AMagnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1993·Granted May 12, 1998·44 cites·27 claims
- 0785US4939614AMagnetic disk medium with circumferentially textured surfaces and varied surface roughness and method of producing the sameHITACHI LTD·Filed 1988·Granted Jul 3, 1990·33 cites·24 claims
- 0884US5504646AMagnetic disk including protective layer having surface with protusions and magnetic disk apparatus including the magnetic diskHITACHI LTD·Filed 1993·Granted Apr 2, 1996·29 cites·23 claims
- 0984US5353182AMagnetic disk unit having magnetic disks and a magnetic head with a head slider which is in contact with surfaces of the magnetic diskHITACHI LTD·Filed 1992·Granted Oct 4, 1994·31 cites·9 claims
- 1082US6627253B2Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatusHITACHI LTD·Filed 2001·Granted Sep 30, 2003·16 cites·6 claims
- 1178US5411630AMagnetic disk manufacturing methodHITACHI LTD·Filed 1993·Granted May 2, 1995·29 cites·23 claims
- 1278US4734802AFilm magnetic head slider having a contacting portion containing zirconia and carbonHITACHI LTD·Filed 1985·Granted Mar 29, 1988·29 cites·7 claims
- 1377US6303205B1Magnetic disk including protective layer having surface with protrusions, and substrate thereforHITACHI LTD·Filed 1999·Granted Oct 16, 2001·24 cites·12 claims
- 1477US5665478AMagnetic recording media for longitudinal recordingHITACHI LTD·Filed 1994·Granted Sep 9, 1997·32 cites·44 claims
- 1577US5500296AMagnetic recording medium, process for producing magnetic recording medium, apparatus for producing magnetic recording medium, and magnetic recording apparatusHITACHI LTD·Filed 1994·Granted Mar 19, 1996·25 cites·8 claims
- 1676US4883711AMagnetic recording mediumHITACHI LTD·Filed 1987·Granted Nov 28, 1989·30 cites·9 claims
- 1775US6057021AMagnetic recording media and magnetic recording system using the sameHITACHI LTD·Filed 1997·Granted May 2, 2000·42 cites·7 claims
- 1874US5285343AMagnetic disk with surface protective layer having convex portions and magnetic disk apparatus including such a magnetic diskHITACHI LTD·Filed 1990·Granted Feb 8, 1994·26 cites·20 claims
- 1970US6335103B1Magnetic recording media for longitudinal recordingHITACHI LTD·Filed 1997·Granted Jan 1, 2002·21 cites·26 claims
- 2067US5272581ADisk-type recording medium and storage apparatusHITACHI LTD·Filed 1991·Granted Dec 21, 1993·19 cites·7 claims
- 2164US4636901AThin film magnetic head having magnetic layers of different thickness and manufacturing method thereforHITACHI LTD·Filed 1983·Granted Jan 13, 1987·10 cites·7 claims
- 2260US4639803AThin film magnetic head sliderHITACHI LTD·Filed 1985·Granted Jan 27, 1987·11 cites·3 claims
- 2359US5656349AMagnetic disk, method of manufacturing the same and magnetic disk apparatus including the magnetic diskHITACHI LTD·Filed 1991·Granted Aug 12, 1997·12 cites·21 claims
- 2458US5280401AMagnetic recording medium, method for producing same and magnetic recording apparatusHITACHI LTD·Filed 1991·Granted Jan 18, 1994·11 cites·32 claims
- 2555US5930073AMagnetic disk including protective layer having surface with magnetic disk including protrusions, and magnetic disk apparatus including the magnetic diskHITACHI LTD·Filed 1996·Granted Jul 27, 1999·9 cites·21 claims
- 2653US4841402AThin film magnetic head and method of manufactureHITACHI LTD·Filed 1987·Granted Jun 20, 1989·14 cites·9 claims
- 2737US4939045AMagnetic recording mediumHITACHI LTD·Filed 1988·Granted Jul 3, 1990·5 cites·22 claims
- 2832USRE35490EThin film magnetic head having magnetic layers of different thickness and manufacturing method thereforHITACHI LTD·Filed 1989·Granted Apr 8, 1997·1 cites·8 claims
- 2925US5158833AMagnetic recording mediumHITACHI LTD·Filed 1990·Granted Oct 27, 1992·1 cites·23 claims
Join the waitlist — get patent alerts
Get an alert when Masaki Ohura files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →