Inventor
HARPER DAVID H F
US28 patents
Patents
28 patentsUS9892751B1Feb 13, 2018
Achieving fine motion between modules in a magnetic head
IBM27 citations94
US10395682B2Aug 27, 2019
Achieving fine motion between modules in a magnetic head
IBM6 citations84
US10332554B1Jun 25, 2019
Tape drive temperature control for media dimensional stability
IBM9 citations84
US9947354B1Apr 17, 2018
Utilization of multiple writer modules for simultaneously writing two times the number of data tracks in a compact form factor
IBM11 citations84
US9355663B1May 31, 2016
Multiple degree of freedom actuator assemblies having flexure based pivot functionality
IBM10 citations84
US10395687B1Aug 27, 2019
Tape drive bearing temperature control
IBM4 citations73
US9685189B1Jun 20, 2017
Reduced reel motor disturbances in a tape drive system
IBM2 citations73
US9626993B2Apr 18, 2017
Actuator coil temperature estimation using skew values
IBM2 citations73
US9466334B1Oct 11, 2016
Monolithic tape head and actuator for high density recording
IBM5 citations73
US9251821B1Feb 2, 2016
Attenuation of a pitch mode for actuator assemblies having multiple degrees of freedom
IBM5 citations73
US10424333B2Sep 24, 2019
Attenuating reaction forces caused by externally supported stators in brushless DC motors
IBM2 citations71
US10424332B2Sep 24, 2019
Attenuating reaction forces caused by internally supported stators in brushless DC motors
IBM2 citations71
US10553245B2Feb 4, 2020
Damping lateral tape motion disturbances
IBM1 citations70
US9984720B1May 29, 2018
Damping lateral tape motion disturbances
IBM3 citations70
US10236023B2Mar 19, 2019
Planar mono coil for two stage head actuator
IBM1 citations62
US8958170B1Feb 17, 2015
Management of tape drive quality using discrete fourier transform analysis
IBM3 citations62
US10679662B2Jun 9, 2020
Tape drive bearing temperature control
IBM0 citations52
US10580443B2Mar 3, 2020
Planar mono coil for two stage head actuator
IBM0 citations52
US10515663B2Dec 24, 2019
Tape drive bearing temperature control
IBM0 citations52
US10410670B1Sep 10, 2019
Tape drive temperature control for media dimensional stability
IBM0 citations52
US10374475B2Aug 6, 2019
Reduced reel motor disturbances in a tape drive system
IBM0 citations52
US9997181B2Jun 12, 2018
Actuator coil temperature estimation using skew values
IBM0 citations52
US9548077B1Jan 17, 2017
Detecting and compensating for external vibration in a tape drive
IBM1 citations52
US9449637B2Sep 20, 2016
Reduced reel motor disturbances in a tape drive system
IBM1 citations52
US9583126B1Feb 28, 2017
Dual-path flex circuit
IBM1 citations51
US10789980B2Sep 29, 2020
Attenuating reaction forces caused by externally supported stators in brushless DC motors
IBM0 citations50
US10783919B2Sep 22, 2020
Attenuating reaction forces caused by internally supported stators in brushless DC motors
IBM0 citations50
US10832724B2Nov 10, 2020
Damping lateral tape motion disturbances
IBM0 citations49