Inventor
ROSEN HAL J
US44 patents
⚠️ This page may combine multiple inventors who share the name “ROSEN HAL J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
29 patentsUS5255262AOct 19, 1993
Multiple data surface optical data storage system with transmissive data surfaces
IBM126 citations99
US5202875AApr 13, 1993
Multiple data surface optical data storage system
IBM168 citations99
US5381401AJan 10, 1995
Multiple data surface optical data storage system
IBM65 citations97
US5606546AFeb 25, 1997
Optical data storage medium with multiple writable data layers separated by dieletric layers
IBM45 citations96
US5499231AMar 12, 1996
Optical disk drive with multiple data layer disk and system for focusing the optical beam
IBM56 citations96
US5446723AAug 29, 1995
Multiple data surface optical data storage system
IBM41 citations96
US5373499ADec 13, 1994
Multilayer optical disk and system having multiple optical paths include identical total disk substrate thickness
IBM71 citations96
US5627817AMay 6, 1997
Optical disk data storage system with multiple write-once dye-based data layers
IBM58 citations95
US5625609AApr 29, 1997
Multiple data layer optical disk drive system with fixed aberration correction and optimum interlayer spacing
IBM65 citations95
US5555537ASep 10, 1996
Optical data storage system with multiple write-once phase-change recording layers
IBM58 citations95
US4873430AOct 10, 1989
Method 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 film
IBM122 citations93
US5933230AAug 3, 1999
Surface inspection tool
IBM34 citations92
US5615186AMar 25, 1997
Multiple data surface data storage system with holographic filter element
IBM28 citations92
US5513170AApr 30, 1996
Multiple data surface optical data storage system
IBM20 citations92
US5487060AJan 23, 1996
Multiple data surface data storage system and method
IBM30 citations92
US5449590ASep 12, 1995
Multiple data surface optical data storage system
IBM37 citations92
US6624884B1Sep 23, 2003
Surface inspection tool
IBM54 citations91
US6704435B1Mar 9, 2004
Surface inspection tool
IBM42 citations90
US5610901AMar 11, 1997
Multiple data surface optical data storage system
IBM9 citations82
US5598398AJan 28, 1997
Multiple data surface optical data storage system
IBM9 citations82
US5410530AApr 25, 1995
Multiple data surface optical data storage system
IBM14 citations82
US5420834AMay 30, 1995
Optical disk recorders using disks coatings close to outer surfaces with optical path extending through a thick transparent substrate
IBM19 citations81
US5586107ADec 17, 1996
Multiple data surface optical data storage system
IBM13 citations74
US6117620ASep 12, 2000
Method of producing a calibration disk
IBM15 citations73
US6100971AAug 8, 2000
Surface inspection tool
IBM13 citations73
US5969370AOct 19, 1999
Surface inspection tool
IBM11 citations73
US5917589AJun 29, 1999
Surface inspection tool
IBM11 citations73
US5867261AFeb 2, 1999
Surface inspection tool
IBM13 citations73
US5847823ADec 8, 1998
Surface inspection tool
IBM8 citations73
HITACHI GLOBAL STORAGE TECH
8 patentsUS7606065B2Oct 20, 2009
Three-dimensional magnetic memory having bits transferrable between storage layers
HITACHI GLOBAL STORAGE TECH9 citations84
US7488545B2Feb 10, 2009
Perpendicular magnetic recording medium with laminated recording layers formed of exchange-coupled ferromagnetic layers
HITACHI GLOBAL STORAGE TECH19 citations83
US7388776B1Jun 17, 2008
Three-dimensional magnetic memory
HITACHI GLOBAL STORAGE TECH8 citations74
US6989952B2Jan 24, 2006
Magnetic recording disk drive with laminated media and improved media signal-to-noise ratio
HITACHI GLOBAL STORAGE TECH4 citations62
USRE38474EMar 23, 2004
CoCrPtB alloys with increased boron content and method of producing same
HITACHI GLOBAL STORAGE TECH2 citations62
US7180710B2Feb 20, 2007
Magnetic recording medium having three ferromagnetic layers with increasing intrinsic coercivity from the lower to the upper layer
HITACHI GLOBAL STORAGE TECH2 citations61
US7177118B2Feb 13, 2007
Magnetic recording system with three-layer laminated media having improved signal-to-noise ratio
HITACHI GLOBAL STORAGE TECH2 citations61
US6963461B2Nov 8, 2005
Method for magnetic recording on laminated media with improved media signal-to-noise ratio
HITACHI GLOBAL STORAGE TECH0 citations41
HITACHI GLOBAL STORAGE TECH NL
3 patentsUS7986491B2Jul 26, 2011
Hard disk drive with disk separator for creating axial gaps between disks for access by read/write heads
HITACHI GLOBAL STORAGE TECH NL27 citations93
US8048546B2Nov 1, 2011
Perpendicular magnetic recording disk with ordered nucleation layer and method for making the disk
HITACHI GLOBAL STORAGE TECH NL10 citations84
US8018765B2Sep 13, 2011
Three-dimensional magnetic memory
HITACHI GLOBAL STORAGE TECH NL1 citations63