Inventor
YARMCHUK EDWARD JOHN
US31 patents
⚠️ This page may combine multiple inventors who share the name “YARMCHUK EDWARD JOHN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
27 patentsUS6476989B1Nov 5, 2002
Radial self-propagation pattern generation for disk file servowriting
IBM117 citations97
US6411453B1Jun 25, 2002
Methods, apparatus and program products for determining off-track time shaft estimates to be used in writing timing patterns on a storage medium
IBM49 citations96
US6344942B1Feb 5, 2002
Method and apparatus for absolute track spacing determination for self-servowriting
IBM62 citations96
US5991115ANov 23, 1999
Method and apparatus for determining separation between read and write elements of a transducer
IBM51 citations96
US5907447AMay 25, 1999
Radial self-propagation pattern generation for disk file servowriting
IBM89 citations96
US5901003AMay 4, 1999
Method and apparatus for determining systematic errors
IBM48 citations96
US5844742ADec 1, 1998
Radial self-propagation pattern generation for disk file servowriting
IBM44 citations96
US5757574AMay 26, 1998
Methods and systems for self-servowriting including maintaining a reference level within a usable dynamic range
IBM42 citations96
US5659436AAug 19, 1997
Radial self propagation pattern generation for disk file servowriting
IBM80 citations96
US6469859B1Oct 22, 2002
Method and system for accurate self-servowriting with normalization in a disk drive
IBM44 citations95
US6430001B1Aug 6, 2002
Integrated data storage disk and disk drive
IBM22 citations92
US6324027B1Nov 27, 2001
Method and apparatus for correcting for random errors in timing pattern generation
IBM20 citations92
US6307697B1Oct 23, 2001
Method and apparatus for correcting for systematic errors in timing pattern generation
IBM23 citations92
US6101055AAug 8, 2000
Trigger pattern detection method and apparatus
IBM19 citations92
US6078450AJun 20, 2000
Method and apparatus for correcting for random errors in timing pattern generation
IBM18 citations92
US6075668AJun 13, 2000
Method and apparatus for correcting for random errors in timing pattern generation
IBM21 citations92
US6031680AFeb 29, 2000
Methods and systems for self-servowriting including maintaining a reference level within a usable dynamic range
IBM21 citations92
US6005738ADec 21, 1999
Methods and systems for self-servo-writing including writing positioning and timing bursts at different track pitches
IBM28 citations92
US5875064AFeb 23, 1999
Method and system for accurate self-servowriting with normalization in a disk drive
IBM38 citations92
US5793554AAug 11, 1998
Self-servowriting system with dynamic error propagation reduction
IBM34 citations92
US6101063AAug 8, 2000
Methods and systems for self-servowriting including maintaining a reference level within a usable dynamic range
IBM11 citations82
US6301071B2Oct 9, 2001
Methods and systems for self-servowriting including maintaining a reference level within a usable dynamic range
IBM5 citations74
US6259574B1Jul 10, 2001
Trigger pattern detection method and apparatus
IBM8 citations74
US6252732B1Jun 26, 2001
Method and apparatus for correcting systematic errors in timing pattern generation
IBM12 citations74
US6249399B1Jun 19, 2001
Methods and systems for self-servowriting including maintaining a reference level within a useable dynamic range
IBM11 citations74
US5648720AJul 15, 1997
Apparatus and method for producing a magnetic image of a conductive pattern using eddy currents
IBM9 citations74
US6215606B1Apr 10, 2001
Method and system for determining the widest recording head of a recording device
IBM9 citations69
HITACHI GLOBAL STORAGE TECH
3 patentsUS6603627B1Aug 5, 2003
Creating an initial set of tracks in a self-servowriting system using a compliant crashstop to control head movement
HITACHI GLOBAL STORAGE TECH26 citations93
US6600621B1Jul 29, 2003
Techniques for multitrack positioning and controlling error growth in self-servowriting systems
HITACHI GLOBAL STORAGE TECH23 citations92
US6898035B1May 24, 2005
Method and apparatus for correcting for systematic errors in timing pattern generation
HITACHI GLOBAL STORAGE TECH9 citations74