Inventor · disambiguated record
Masafumi Iwashiro
Also filed as: IWASHIRO MASAFUMI
19 granted patents·8 pending applications·96 citations·filing 1997–2024
93Inventor score
Top patents by PatentIndex Score
27 records- 0189US7158334B2Method and apparatus for head positioning control with disturbance compensation in a disk driveTOSHIBA KK·Filed 2005·Granted Jan 2, 2007·12 cites·11 claims
- 0281US10553248B1Magnetic disk device and head position control methodTOSHIBA KK·Filed 2019·Granted Feb 4, 2020·5 cites·8 claims
- 0380US7423835B2Method and apparatus for servo control using spiral servo information in a disk driveTOSHIBA KK·Filed 2006·Granted Sep 9, 2008·5 cites·10 claims
- 0480US7221533B2Method and apparatus for servo information writing in a disk driveTOSHIBA KK·Filed 2005·Granted May 22, 2007·4 cites·10 claims
- 0578US6680812B1Head positioning control system using sampled data control system for disk driveTOKYO SHIBAURA ELECTRIC CO·Filed 2000·Granted Jan 20, 2004·14 cites·2 claims
- 0677US6934116B2Method and apparatus for head positioning control in a disk driveTOSHIBA KK·Filed 2003·Granted Aug 23, 2005·13 cites·19 claims
- 0773US8773808B2Magnetic disk device and head-position control methodIWASHIRO MASAFUMI·Filed 2012·Granted Jul 8, 2014·4 cites·17 claims
- 0865US6940680B2Method and apparatus for head positioning control in disk driveTOSHIBA KK·Filed 2001·Granted Sep 6, 2005·6 cites·5 claims
- 0964US8817416B2Magnetic disk device and method of controlling magnetic headsTOSHIBA KK·Filed 2013·Granted Aug 26, 2014·1 cites·7 claims
- 1060US10217485B1Magnetic disc device and position control methodTOSHIBA KK·Filed 2018·Granted Feb 26, 2019·1 cites·10 claims
- 1159US7061710B2Method and apparatus for positioning a head in a disk drive with servo writing functionTOSHIBA KK·Filed 2004·Granted Jun 13, 2006·4 cites·6 claims
- 1259US6429996B1Method and apparatus for head-positioning control, for use in a disk driveTOSHIBA KK·Filed 1999·Granted Aug 6, 2002·14 cites·9 claims
- 1358US10372375B2Magnetic disk device and command reordering method thereofTOSHIBA KK·Filed 2017·Granted Aug 6, 2019·1 cites·16 claims
- 1453US2009316294A1Head positioning control method, magnetic disk apparatus and feedback control methodTOSHIBA KK·Filed 2009·Application pending·0 cites
- 1549US2008002279A1Method and apparatus for writing a spiral servo pattern on a disk in a disk driveTOSHIBA KK·Filed 2007·Application pending·0 cites
- 1649US2008068740A1Method and apparatus for writing servo data and positioning head in a disk driveTOSHIBA KK·Filed 2007·Application pending·0 cites
- 1748US11875821B2Disk deviceTOSHIBA KK·Filed 2022·Granted Jan 16, 2024·0 cites·20 claims
- 1848US7173789B2Head position calculation method in magnetic disc apparatusTOSHIBA KK·Filed 2005·Granted Feb 6, 2007·0 cites·2 claims
- 1947US2007047132A1Method and apparatus for writing servo informationTOSHIBA KK·Filed 2006·Application pending·0 cites
- 2046US11996127B2Method for manufacturing disk device and computer program productTOSHIBA KK·Filed 2023·Granted May 28, 2024·0 cites·8 claims
- 2146US8315008B2Magnetic disk device and head position control methodSUZUKI ATSUSHI·Filed 2011·Granted Nov 20, 2012·0 cites·6 claims
- 2245US12462837B2Magnetic disk device and methodTOSHIBA KK·Filed 2024·Granted Nov 4, 2025·0 cites·20 claims
- 2345US2006109583A1Method and apparatus for servo writing with servo pattern examination in a disk driveTOSHIBA KK·Filed 2005·Application pending·0 cites
- 2442US5847527AMethod and apparatus for digital position controlTOSHIBA KK·Filed 1997·Granted Dec 8, 1998·12 cites·12 claims
- 2540US2004213100A1Method and apparatus for head positioning with disturbance compensation in a disk driveTOSHIBA KK·Filed 2004·Application pending·0 cites
- 2633US2016343393A1Magnetic disk device and position control methodTOSHIBA KK·Filed 2015·Application pending·0 cites
- 2731US2016125902A1Magnetic disk device and control methodTOSHIBA KK·Filed 2015·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Masafumi Iwashiro 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 →