Inventor
SERRANO LOUIS JOSEPH
US47 patents
⚠️ This page may combine multiple inventors who share the name “SERRANO LOUIS JOSEPH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
38 patentsUS6115200ASep 5, 2000
Method and apparatus for preventing write operations in the presence of post-shock motion
IBM100 citations98
US6429990B2Aug 6, 2002
Method and apparatus for controlling write operations of a data storage system subjected to a shock event
IBM100 citations97
US6188191B1Feb 13, 2001
Servo system responsive to temperature changes
IBM103 citations97
US6034835AMar 7, 2000
Multiple servo track types using multiple frequency servo patterns
IBM62 citations96
US5761007AJun 2, 1998
Disk drive with multiple actuators on a single axis having different inertia characteristics
IBM70 citations96
US5757567AMay 26, 1998
Method and apparatus for servo control with high efficiency gray code for servo track ID
IBM67 citations96
US5781363AJul 14, 1998
Servo-free velocity estimator for coil driven actuator arm in a data storage drive
IBM80 citations94
US6226140B1May 1, 2001
Shock detector in a disk drive servo control system
IBM39 citations93
US6215608B1Apr 10, 2001
Hardware inhibit for a disk drive digital servo control system
IBM29 citations93
US6078445AJun 20, 2000
Gain control for a dual burst, dual frequency PES servo pattern
IBM36 citations93
US6049438AApr 11, 2000
Method and apparatus for encoding digital servo information in a servo burst
IBM36 citations93
US5999357ADec 7, 1999
Method and apparatus for spindle synchronization to reduce drive to drive runout
IBM19 citations93
US6594106B1Jul 15, 2003
Adaptive servo estimator and compensator for coil and carriage deformation in voice coil motor driven hard disk drive
IBM26 citations92
US6563657B1May 13, 2003
Multiple and reconfigurable data access and storage device using multiple actuators
IBM26 citations92
US6519109B1Feb 11, 2003
Method and apparatus for providing feedforward control of two interacting actuators
IBM43 citations92
US6362766B1Mar 26, 2002
Variable pulse PWM DAC method and apparatus
IBM22 citations92
US6181500B1Jan 30, 2001
Self servo rewrite method and apparatus
IBM39 citations92
US6122125ASep 19, 2000
Head selectable servo notch filter and method for improving servo system performance
IBM19 citations92
US6111720AAug 29, 2000
Method and apparatus for providing separate read/write velocity curves
IBM20 citations92
US6005743ADec 21, 1999
Disk drive with multiple actuators on a single axis and disk surfaces of differing track pitch
IBM40 citations92
US5898286AApr 27, 1999
Digital servo control system for a data recording disk file with improved saturation modelling
IBM29 citations92
US5825579AOct 20, 1998
Disk drive servo sensing gain normalization and linearization
IBM57 citations92
US6421198B1Jul 16, 2002
Linearity compensation for a position error signal based on repeatable and non-repeatable run out in a disk drive
IBM41 citations91
US5963393AOct 5, 1999
Servo-free velocity estimator for coil driven actuator arm in a data storage drive
IBM21 citations91
US6522493B1Feb 18, 2003
Position error signal linearization using an auxiliary discontinuity removal routine
IBM34 citations90
US6429995B1Aug 6, 2002
Position error signal calibration using measured bursts
IBM47 citations90
US6342985B1Jan 29, 2002
Method and apparatus for improving disk drive seek performance
IBM32 citations88
US6282046B1Aug 28, 2001
Current limiting in high performance files
IBM24 citations88
US6577463B1Jun 10, 2003
Tangential misalignment precompensation in a direct access storage device
IBM13 citations84
US6469855B1Oct 22, 2002
Method and system for adaptive settle and write inhibit constraints based on head geometry and servo/mechanical system
IBM15 citations84
US6462898B2Oct 8, 2002
Disk drive with information encoded in the position error signal fields
IBM18 citations84
US5912782AJun 15, 1999
System and method for adjusting actuator control current for directional torque variance in a disk drive
IBM19 citations81
US6426843B1Jul 30, 2002
Settle time estimator feedback for rotational position reordering in data storage devices
IBM10 citations74
US6141176AOct 31, 2000
Data storage disk with information encoded in the position error signal fields
IBM14 citations74
US6088188AJul 11, 2000
System and method for determining when hard disk drive power amplifier is saturated
IBM8 citations74
US5793555AAug 11, 1998
Seek optimization for disk files with side-by-side head
IBM14 citations74
US6388832B1May 14, 2002
Method and system for providing spindle motor control for head loading in a disk drive
IBM11 citations73
US6219198B1Apr 17, 2001
State estimator alteration for odd sample times in a disk drive servo control system
IBM10 citations71
TULA TECHNOLOGY INC
5 patentsUS11208093B1Dec 28, 2021
Motor torque smoothing for recharging events on combustion engines
TULA TECHNOLOGY INC3 citations73
US11143125B1Oct 12, 2021
Motor torque smoothing on combustion engines by approximating a periodic waveform using sinusoids
TULA TECHNOLOGY INC1 citations73
US11719175B2Aug 8, 2023
Motor torque smoothing on combustion engines by approximating a periodic waveform using sinusoids
TULA TECHNOLOGY INC0 citations63
US11560135B2Jan 24, 2023
Motor torque smoothing for recharging events on combustion engines
TULA TECHNOLOGY INC0 citations63
US11421613B2Aug 23, 2022
Motor torque smoothing on combustion engines by approximating a periodic waveform using sinusoids
TULA TECHNOLOGY INC0 citations63