P

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 patents
US6115200ASep 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 patents

CUMMINS INC

2 patents

HITACHI GLOBAL STORAGE TECH

1 patent

LSI LOGIC CORP

1 patent