Inventor · disambiguated record
Hal Hjalmar Ottesen
Also filed as: OTTESEN HAL H · OTTESEN HAL HJALMAR · SRI-JAYANTHA SRI M
92 granted patents·1 pending application·5,556 citations·filing 1992–2004
99Inventor score
Top patents by PatentIndex Score
93 records- 0198US6529685B2Multimedia direct access storage device and formatting methodIBM·Filed 2001·Granted Mar 4, 2003·97 cites·20 claims
- 0298US5721815AMedia-on-demand communication system and method employing direct access storage deviceIBM·Filed 1995·Granted Feb 24, 1998·652 cites·24 claims
- 0398US5521778ADisk drive with primary and secondary actuator drivesIBM·Filed 1994·Granted May 28, 1996·213 cites·20 claims
- 0498US5455723AMethod and apparatus for ramp load and unloadIBM·Filed 1994·Granted Oct 3, 1995·107 cites·15 claims
- 0597US6674590B2System and method for estimating a frequency of slider airbearing resonanceHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jan 6, 2004·63 cites·41 claims
- 0697US6519102B1Method and apparatus for implementing an in-situ digital harmonic computation facility for direct access storage device (DASD)IBM·Filed 2000·Granted Feb 11, 2003·100 cites·14 claims
- 0797US5930493AMultimedia server system and method for communicating multimedia informationIBM·Filed 1995·Granted Jul 27, 1999·461 cites·20 claims
- 0897US5721878AMultimedia control system and method for controlling multimedia program presentationIBM·Filed 1995·Granted Feb 24, 1998·353 cites·23 claims
- 0996US5764430ADisk drive having optimized spindle speed for environmentIBM·Filed 1996·Granted Jun 9, 1998·107 cites·8 claims
- 1096US5751883AMultimedia direct access storage device and formatting methodIBM·Filed 1997·Granted May 12, 1998·208 cites·28 claims
- 1196US5654747AIntelligent multimedia set-top control method and apparatus in which billing signals are communicated to an information network upon presentation of downloaded media programsIBM·Filed 1994·Granted Aug 5, 1997·242 cites·29 claims
- 1296US5377058AFly height servo control of read/write head suspensionIBM·Filed 1992·Granted Dec 27, 1994·236 cites·18 claims
- 1395US5778135AReal-time edit control for video program materialIBM·Filed 1994·Granted Jul 7, 1998·196 cites·4 claims
- 1495US5739972AMethod and apparatus for positioning a magnetoresistive head using thermal response to servo information on the record mediumIBM·Filed 1996·Granted Apr 14, 1998·75 cites·23 claims
- 1594US6671111B2Readback signal detection and analysis in a magnetic data storage systemIBM·Filed 2001·Granted Dec 30, 2003·42 cites·37 claims
- 1694US6104562AMultiple element transducer for magnetic recordingIBM·Filed 1997·Granted Aug 15, 2000·92 cites·19 claims
- 1794US6097559ASystem and method for detecting head-to-disk contact in-situ a direct access storage device using a position error signalIBM·Filed 1998·Granted Aug 1, 2000·93 cites·26 claims
- 1894US5920441AMethod and apparatus for controlling a multiple-stage actuator for a disk driveIBM·Filed 1995·Granted Jul 6, 1999·86 cites·5 claims
- 1993US6384994B1Method for positioning a magnetoresistive head using a thermal response to servo information on the record mediumIBM·Filed 2000·Granted May 7, 2002·31 cites·20 claims
- 2093US6088176AMethod and apparatus for separating magnetic and thermal components from an MR read signalIBM·Filed 1996·Granted Jul 11, 2000·84 cites·77 claims
- 2193US6067203ADisk drive having optimized spindle speed for environmentIBM·Filed 1998·Granted May 23, 2000·70 cites·24 claims
- 2292US6717763B2Power savings method and apparatus for disk drivesHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Apr 6, 2004·36 cites·20 claims
- 2392US6154335AMethod and apparatus for positioning a dual element magnetoresistive headIBM·Filed 1998·Granted Nov 28, 2000·55 cites·9 claims
- 2492US6005742AMethod and apparatus for controlling a multiple-stage actuator for a disk driveIBM·Filed 1998·Granted Dec 21, 1999·65 cites·14 claims
- 2592US5392290ASystem and method for preventing direct access data storage system data loss from mechanical shock during write operationIBM·Filed 1992·Granted Feb 21, 1995·67 cites·19 claims
- 2691US6762899B2Method and apparatus for estimating the flyheight of an airbearing slider in a storage device using variable spindle velocityHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jul 13, 2004·32 cites·15 claims
- 2791US5751510AMethod and apparatus for restoring a thermal response signal of a magnetoresistive headIBM·Filed 1996·Granted May 12, 1998·67 cites·20 claims
- 2890US7027263B2Apparatus for look-ahead thermal sensing in a data storage deviceHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Apr 11, 2006·27 cites·31 claims
- 2990US6288856B1Real-time head-to-disk clearance measuring method and apparatusIBM·Filed 1999·Granted Sep 11, 2001·61 cites·36 claims
- 3090US5936788AMethod and apparatus for ramp load and unloadIBM·Filed 1998·Granted Aug 10, 1999·47 cites·4 claims
- 3190US5301080ABias servo loop for magneto-resistive read/write headIBM·Filed 1992·Granted Apr 5, 1994·51 cites·20 claims
- 3289US6768607B2Adaptive dual-frequency notch filterHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jul 27, 2004·27 cites·23 claims
- 3389US6765745B2Method and apparatus for in situ detection of high-flying sliders over customer dataHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jul 20, 2004·25 cites·19 claims
- 3489US5875066AMethod and apparatus for real-time filtering of a position error signal for a disk drive servo systemIBM·Filed 1996·Granted Feb 23, 1999·45 cites·12 claims
- 3589US5367409AEven harmonic distortion compensation for digital data detectionIBM·Filed 1993·Granted Nov 22, 1994·48 cites·8 claims
- 3688US6775081B2Servo format for disk drive data storage devicesHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Aug 10, 2004·26 cites·17 claims
- 3788US6208804B1Multimedia direct access storage device and formatting methodIBM·Filed 1998·Granted Mar 27, 2001·91 cites·28 claims
- 3887US6956707B2Method for look-ahead thermal sensing in a data storage deviceHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Oct 18, 2005·22 cites·21 claims
- 3987US5831786ADisk drive having position sensor for ramp load and unload, and method for its useIBM·Filed 1997·Granted Nov 3, 1998·38 cites·10 claims
- 4086US6665134B2Methods and apparatus for detection and analysis of an envelope of a frequency modulated readback signal in a magnetic storage systemIBM·Filed 2001·Granted Dec 16, 2003·19 cites·40 claims
- 4185US6657809B2Method and apparatus for positioning a transducer using a phase difference in surface profile variations on a storage mediumIBM·Filed 2001·Granted Dec 2, 2003·19 cites·4 claims
- 4285US6417982B1System and method for identifying and filtering a head suspension assembly resonance frequencyIBM·Filed 1998·Granted Jul 9, 2002·43 cites·30 claims
- 4384US5854722AMethod and apparatus for rotary actuator arc compensation correction in a direct access storage deviceIBM·Filed 1995·Granted Dec 29, 1998·43 cites·5 claims
- 4483US6831808B2Method and apparatus for determining track identity from abbreviated track identifying data in a disk drive data storage deviceHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Dec 14, 2004·17 cites·20 claims
- 4583US6785079B2Method and apparatus for estimating the flyheight of an airbearing slider in a storage deviceHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Aug 31, 2004·15 cites·8 claims
- 4683US6683737B2Method and apparatus for predictive failure analysis technique for head crashes in hard drives using position error signalHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jan 27, 2004·16 cites·14 claims
- 4783US6678108B2Method and apparatus for identifying spindle imbalance in a hard disk driveIBM·Filed 2001·Granted Jan 13, 2004·17 cites·20 claims
- 4883US6608727B2Method and apparatus for determining the tribology for a head/disk interfaceHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Aug 19, 2003·17 cites·20 claims
- 4983US5619387ADisk storage device with spiral data track and incremental error offsets in angularly spaced imbedded concentric servo patternsIBM·Filed 1996·Granted Apr 8, 1997·33 cites·7 claims
- 5082US6281676B1Rigid disk surface defect detection and classificationIBM·Filed 1998·Granted Aug 28, 2001·37 cites·13 claims
Showing the top 50 of 93 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →