Inventor · disambiguated record
Hal J. Rosen
Also filed as: ROSEN HAL J · ROSEN HAL JERVIS
55 granted patents·3 pending applications·1,940 citations·filing 1988–2016
99Inventor score
Files withIBM40HITACHI GLOBAL STORAGE TECH8HGST Netherlands BV2HITACHI GLOBAL STORAGE TECH NL2BERGER ANDREAS K1
Top patents by PatentIndex Score
58 records- 0198US5255262AMultiple data surface optical data storage system with transmissive data surfacesIBM·Filed 1991·Granted Oct 19, 1993·126 cites·37 claims
- 0298US5202875AMultiple data surface optical data storage systemIBM·Filed 1991·Granted Apr 13, 1993·168 cites·20 claims
- 0397US5381401AMultiple data surface optical data storage systemIBM·Filed 1993·Granted Jan 10, 1995·65 cites·98 claims
- 0496US7986491B2Hard disk drive with disk separator for creating axial gaps between disks for access by read/write headsHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted Jul 26, 2011·27 cites·20 claims
- 0596US6280813B1Magnetic recording media with antiferromagnetically coupled ferromagnetic films as the recording layerIBM·Filed 1999·Granted Aug 28, 2001·182 cites·18 claims
- 0696US4873430AMethod and apparatus for optically measuring characteristics of a thin film by directing a P-polarized beam through an integrating sphere at the brewster's angle of the filmIBM·Filed 1988·Granted Oct 10, 1989·122 cites·15 claims
- 0794US5373499AMultilayer optical disk and system having multiple optical paths include identical total disk substrate thicknessIBM·Filed 1993·Granted Dec 13, 1994·71 cites·16 claims
- 0893US8270256B1Magnetic recording disk drive with shingled writing and wide-area thermal assistanceJUANG JIA-YANG·Filed 2011·Granted Sep 18, 2012·28 cites·14 claims
- 0993US8208228B2Current-perpendicular-to-the-plane (CPP) magnetoresistive read head with multiple sensing elements for patterned-mediaMAAT STEFAN·Filed 2009·Granted Jun 26, 2012·34 cites·17 claims
- 1093US7488545B2Perpendicular magnetic recording medium with laminated recording layers formed of exchange-coupled ferromagnetic layersHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Feb 10, 2009·19 cites·11 claims
- 1192US5606546AOptical data storage medium with multiple writable data layers separated by dieletric layersIBM·Filed 1996·Granted Feb 25, 1997·45 cites·49 claims
- 1291US8416646B2Magnetic recording disk drive with shingled writing and rectangular optical waveguide for wide-area thermal assistanceHUANG FU-YING·Filed 2011·Granted Apr 9, 2013·18 cites·12 claims
- 1391US6686579B2Digital pen using speckle trackingIBM·Filed 2000·Granted Feb 3, 2004·98 cites·14 claims
- 1491US6372330B1Laminated magnetic recording media with antiferromagnetically coupled layers as the individual magnetic layers in the laminateIBM·Filed 2000·Granted Apr 16, 2002·44 cites·18 claims
- 1591US5499231AOptical disk drive with multiple data layer disk and system for focusing the optical beamIBM·Filed 1994·Granted Mar 12, 1996·56 cites·23 claims
- 1691US5446723AMultiple data surface optical data storage systemIBM·Filed 1995·Granted Aug 29, 1995·41 cites·38 claims
- 1790US8048546B2Perpendicular magnetic recording disk with ordered nucleation layer and method for making the diskHITACHI GLOBAL STORAGE TECH NL·Filed 2009·Granted Nov 1, 2011·10 cites·7 claims
- 1890US5625609AMultiple data layer optical disk drive system with fixed aberration correction and optimum interlayer spacingIBM·Filed 1995·Granted Apr 29, 1997·65 cites·14 claims
- 1989US8385162B2Shingled-writing thermal assistance recording (TAR) disk drive with avoidance of adjacent track erasure from a wide-area heaterHGST Netherlands BV·Filed 2011·Granted Feb 26, 2013·11 cites·12 claims
- 2088US5627817AOptical disk data storage system with multiple write-once dye-based data layersIBM·Filed 1995·Granted May 6, 1997·58 cites·31 claims
- 2188US5555537AOptical data storage system with multiple write-once phase-change recording layersIBM·Filed 1995·Granted Sep 10, 1996·58 cites·40 claims
- 2284US6773834B2Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminateHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Aug 10, 2004·29 cites·18 claims
- 2384US5487060AMultiple data surface data storage system and methodIBM·Filed 1993·Granted Jan 23, 1996·30 cites·16 claims
- 2483US5761188AOptical data storage system with multiple rewritable phase change recording layersIBM·Filed 1997·Granted Jun 2, 1998·42 cites·21 claims
- 2582US9601145B1Heat-assisted magnetic recording (HAMR) disk with multiple continuous magnetic recording layersHGST Netherlands BV·Filed 2016·Granted Mar 21, 2017·6 cites·20 claims
- 2681US5513170AMultiple data surface optical data storage systemIBM·Filed 1995·Granted Apr 30, 1996·20 cites·17 claims
- 2781US5449590AMultiple data surface optical data storage systemIBM·Filed 1995·Granted Sep 12, 1995·37 cites·50 claims
- 2879US6624884B1Surface inspection toolIBM·Filed 1997·Granted Sep 23, 2003·54 cites·15 claims
- 2979US5615186AMultiple data surface data storage system with holographic filter elementIBM·Filed 1995·Granted Mar 25, 1997·28 cites·7 claims
- 3079US5410530AMultiple data surface optical data storage systemIBM·Filed 1994·Granted Apr 25, 1995·14 cites·22 claims
- 3177US5986761ALaser-based inspection tool for disk defects and curvatureIBM·Filed 1998·Granted Nov 16, 1999·45 cites·6 claims
- 3274US6704435B1Surface inspection toolIBM·Filed 1997·Granted Mar 9, 2004·42 cites·20 claims
- 3374US5905700AMultiple data layer optical disk with recorded information identifying the type of trackingIBM·Filed 1998·Granted May 18, 1999·14 cites·18 claims
- 3473US5420834AOptical disk recorders using disks coatings close to outer surfaces with optical path extending through a thick transparent substrateIBM·Filed 1994·Granted May 30, 1995·19 cites·14 claims
- 3570US5933230ASurface inspection toolIBM·Filed 1997·Granted Aug 3, 1999·34 cites·18 claims
- 3666US5666344AMultiple data surface optical data storage systemIBM·Filed 1996·Granted Sep 9, 1997·19 cites·50 claims
- 3766US5610901AMultiple data surface optical data storage systemIBM·Filed 1996·Granted Mar 11, 1997·9 cites·32 claims
- 3865US6117620AMethod of producing a calibration diskIBM·Filed 1998·Granted Sep 12, 2000·15 cites·14 claims
- 3965US5745473AMultiple data layer optical disk with recorded information identifying the type of trackingIBM·Filed 1997·Granted Apr 28, 1998·9 cites·34 claims
- 4065US5598398AMultiple data surface optical data storage systemIBM·Filed 1995·Granted Jan 28, 1997·9 cites·17 claims
- 4164US6183832B1CoCrPtB alloys with increased boron content and method of producing sameIBM·Filed 1998·Granted Feb 6, 2001·16 cites·21 claims
- 4262US6989952B2Magnetic recording disk drive with laminated media and improved media signal-to-noise ratioHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jan 24, 2006·4 cites·22 claims
- 4360US6594100B2Method for recording magnetic transitions on recording layer having antiferromagnetically coupled ferromagnetic filmsHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jul 15, 2003·3 cites·3 claims
- 4458US5586107AMultiple data surface optical data storage systemIBM·Filed 1995·Granted Dec 17, 1996·13 cites·17 claims
- 4556US7180710B2Magnetic recording medium having three ferromagnetic layers with increasing intrinsic coercivity from the lower to the upper layerHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Feb 20, 2007·2 cites·23 claims
- 4655USRE38474ECoCrPtB alloys with increased boron content and method of producing sameHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Mar 23, 2004·2 cites·21 claims
- 4755US5969370ASurface inspection toolIBM·Filed 1997·Granted Oct 19, 1999·11 cites·20 claims
- 4854US7177118B2Magnetic recording system with three-layer laminated media having improved signal-to-noise ratioHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Feb 13, 2007·2 cites·26 claims
- 4953US5945685AGlass substrate inspection tool having a telecentric lens assemblyIBM·Filed 1997·Granted Aug 31, 1999·17 cites·18 claims
- 5048US6100971ASurface inspection toolIBM·Filed 1997·Granted Aug 8, 2000·13 cites·21 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →