Inventor · disambiguated record
David H. F. Harper
Also filed as: HARPER DAVID · HARPER DAVID H · HARPER DAVID H F · HARPER DAVID H FLORES
60 granted patents·287 citations·filing 1988–2024
98Inventor score
Top patents by PatentIndex Score
60 records- 0197US9892751B1Achieving fine motion between modules in a magnetic headIBM·Filed 2016·Granted Feb 13, 2018·27 cites·16 claims
- 0297US8270114B2Magnetically biased tilting roller bearing tape guidanceARGUMEDO ARMANDO JESUS·Filed 2008·Granted Sep 18, 2012·51 cites·20 claims
- 0395US7724466B2Method and system for servo stripe width detection and compensationIBM·Filed 2008·Granted May 25, 2010·23 cites·20 claims
- 0491US10332554B1Tape drive temperature control for media dimensional stabilityIBM·Filed 2018·Granted Jun 25, 2019·9 cites·18 claims
- 0591US9947354B1Utilization of multiple writer modules for simultaneously writing two times the number of data tracks in a compact form factorIBM·Filed 2017·Granted Apr 17, 2018·11 cites·19 claims
- 0690US9355663B1Multiple degree of freedom actuator assemblies having flexure based pivot functionalityIBM·Filed 2015·Granted May 31, 2016·10 cites·19 claims
- 0789US12266387B1Reworkable tape track following actuatorIBM·Filed 2023·Granted Apr 1, 2025·2 cites·19 claims
- 0889US8035926B2System including a pivot assembly for adjusting misalignment and skew between a read/write head and a flexible data storage mediaIBM·Filed 2007·Granted Oct 11, 2011·9 cites·10 claims
- 0988US7649710B2Moving magnet actuation of tape headIBM·Filed 2008·Granted Jan 19, 2010·8 cites·25 claims
- 1087US10854236B1Dynamic tape guide bearing tilt mechanismIBM·Filed 2019·Granted Dec 1, 2020·8 cites·17 claims
- 1186US10424333B2Attenuating reaction forces caused by externally supported stators in brushless DC motorsIBM·Filed 2018·Granted Sep 24, 2019·2 cites·19 claims
- 1286US10395682B2Achieving fine motion between modules in a magnetic headIBM·Filed 2017·Granted Aug 27, 2019·6 cites·17 claims
- 1386US7538980B2Actuator assemblyIBM·Filed 2005·Granted May 26, 2009·8 cites·18 claims
- 1484US10395687B1Tape drive bearing temperature controlIBM·Filed 2018·Granted Aug 27, 2019·4 cites·15 claims
- 1582US10957362B1Non-interfering micro-positioning system utilizing piezoelectric elementsIBM·Filed 2019·Granted Mar 23, 2021·6 cites·16 claims
- 1681US9466334B1Monolithic tape head and actuator for high density recordingIBM·Filed 2015·Granted Oct 11, 2016·5 cites·20 claims
- 1781US7839598B2Balanced linkage actuation of tape headIBM·Filed 2008·Granted Nov 23, 2010·4 cites·24 claims
- 1880US9251821B1Attenuation of a pitch mode for actuator assemblies having multiple degrees of freedomIBM·Filed 2015·Granted Feb 2, 2016·5 cites·20 claims
- 1980US6639760B2Compliant worm gear and worm gear bracketIBM·Filed 2002·Granted Oct 28, 2003·14 cites·12 claims
- 2079US8270108B2Method to minimize the effects of tape skew and tape dimensional stabilityHARPER DAVID H·Filed 2009·Granted Sep 18, 2012·5 cites·8 claims
- 2178US9087539B2Device and method for controlling the position of a head relative to a tape within a tape transport systemIBM·Filed 2014·Granted Jul 21, 2015·3 cites·20 claims
- 2277US11056139B2Semi-flexible structure for micro-positioning a write/read headIBM·Filed 2019·Granted Jul 6, 2021·4 cites·14 claims
- 2376US9984720B1Damping lateral tape motion disturbancesIBM·Filed 2017·Granted May 29, 2018·3 cites·20 claims
- 2476US8958170B1Management of tape drive quality using discrete fourier transform analysisIBM·Filed 2014·Granted Feb 17, 2015·3 cites·20 claims
- 2575US7092196B2Characteristic measurement of an actuation drive coil and associated damping mechanismIBM·Filed 2004·Granted Aug 15, 2006·12 cites·23 claims
- 2675US6934108B2Servo pattern based tape tension control for tape drivesIBM·Filed 2003·Granted Aug 23, 2005·10 cites·30 claims
- 2774US8743508B2Magnetically biased tilting roller bearing tape guidanceARGUMEDO ARMANDO JESUS·Filed 2012·Granted Jun 3, 2014·2 cites·5 claims
- 2873US10424332B2Attenuating reaction forces caused by internally supported stators in brushless DC motorsIBM·Filed 2018·Granted Sep 24, 2019·2 cites·19 claims
- 2971US9626993B2Actuator coil temperature estimation using skew valuesIBM·Filed 2015·Granted Apr 18, 2017·2 cites·20 claims
- 3070US9685189B1Reduced reel motor disturbances in a tape drive systemIBM·Filed 2016·Granted Jun 20, 2017·2 cites·18 claims
- 3168US9449637B2Reduced reel motor disturbances in a tape drive systemIBM·Filed 2014·Granted Sep 20, 2016·1 cites·17 claims
- 3267US11842829B2Flexible electrical cable with four copper layersIBM·Filed 2022·Granted Dec 12, 2023·0 cites·19 claims
- 3367US8749922B2Magnetically biased tilting roller bearing tape guidanceARGUMEDO ARMANDO JESUS·Filed 2012·Granted Jun 10, 2014·1 cites·19 claims
- 3464US10553245B2Damping lateral tape motion disturbancesIBM·Filed 2018·Granted Feb 4, 2020·1 cites·18 claims
- 3564US9583126B1Dual-path flex circuitIBM·Filed 2015·Granted Feb 28, 2017·1 cites·6 claims
- 3663US7061712B2Mono pole piece for a two stage tape drive actuatorIBM·Filed 2004·Granted Jun 13, 2006·4 cites·28 claims
- 3762US10614846B1Measuring servo reader span on a magnetic recording headIBM·Filed 2019·Granted Apr 7, 2020·1 cites·20 claims
- 3862US10374475B2Reduced reel motor disturbances in a tape drive systemIBM·Filed 2016·Granted Aug 6, 2019·0 cites·17 claims
- 3961US12462836B1Spring suspension with independent reader and writer following actuatorIBM·Filed 2024·Granted Nov 4, 2025·0 cites·25 claims
- 4061US10236023B2Planar mono coil for two stage head actuatorIBM·Filed 2015·Granted Mar 19, 2019·1 cites·20 claims
- 4160US11922982B1Tape drive reel including damping to reduce track following errorsIBM·Filed 2022·Granted Mar 5, 2024·0 cites·20 claims
- 4260US9548077B1Detecting and compensating for external vibration in a tape driveIBM·Filed 2015·Granted Jan 17, 2017·1 cites·20 claims
- 4358US10679662B2Tape drive bearing temperature controlIBM·Filed 2019·Granted Jun 9, 2020·0 cites·15 claims
- 4458US7414812B2Actuator assemblyIBM·Filed 2005·Granted Aug 19, 2008·2 cites·19 claims
- 4557US10515663B2Tape drive bearing temperature controlIBM·Filed 2019·Granted Dec 24, 2019·0 cites·15 claims
- 4656US11837263B1Tape erase element included in a tape erase device to erase a tape mediumIBM·Filed 2022·Granted Dec 5, 2023·0 cites·20 claims
- 4755US10832724B2Damping lateral tape motion disturbancesIBM·Filed 2019·Granted Nov 10, 2020·0 cites·17 claims
- 4855US10789980B2Attenuating reaction forces caused by externally supported stators in brushless DC motorsIBM·Filed 2019·Granted Sep 29, 2020·0 cites·19 claims
- 4955US10783919B2Attenuating reaction forces caused by internally supported stators in brushless DC motorsIBM·Filed 2019·Granted Sep 22, 2020·0 cites·19 claims
- 5053US11335377B1Blocking mechanism for a storage cartridge to prevent insertion into a storage driveIBM·Filed 2021·Granted May 17, 2022·0 cites·20 claims
Showing the top 50 of 60 patent records by PatentIndex Score.
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