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Class Information
Number: 360/77.07
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track centering > Rotary carrier > By tracking signal recorded on or immediately beneath surface
Description: Subject matter for processing a signal reproduced from the record carrier for controlling transducer head motion and which signal is distinct from a reproduced information signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7599144 |
Method and apparatus compensating disturbance in state control device |
Oct. 6, 2009 |
| 7567398 |
Detection of fly height change in a disk drive |
Jul. 28, 2009 |
| 7561369 |
Drive unit |
Jul. 14, 2009 |
| 7548393 |
HDD track following control apparatus and method |
Jun. 16, 2009 |
| 7538967 |
Method and apparatus for estimating a position of a head in a disk drive |
May. 26, 2009 |
| 7529054 |
Adaptive recording band expansion methodology |
May. 5, 2009 |
| 7522370 |
Self-servo-write using ramp-tracks |
Apr. 21, 2009 |
| 7489470 |
Magnetic recording apparatus |
Feb. 10, 2009 |
| 7477473 |
Servo positioning adjustment |
Jan. 13, 2009 |
| 7471484 |
Patterned medium and recording head |
Dec. 30, 2008 |
| 7468855 |
Servo writing a disk drive from a number of spiral tracks equal to a non-integer multiple of product servo wedges |
Dec. 23, 2008 |
| 7466101 |
Head position control method, head position control device, and disk device |
Dec. 16, 2008 |
| 7440210 |
Servo writing a disk drive by writing multi-bit sync marks in spiral tracks for improved servo writing |
Oct. 21, 2008 |
| 7433143 |
Adjusting track density by changing slope of spiral tracks used to servo write a disk drive |
Oct. 7, 2008 |
| 7430092 |
Control apparatus, storage apparatus, and computer product |
Sep. 30, 2008 |
| 7420763 |
Disk drive control circuit and method |
Sep. 2, 2008 |
| 7411758 |
Disk drive servo control using spirals |
Aug. 12, 2008 |
| 7408735 |
Data tracking method and apparatus for disk-based data storage |
Aug. 5, 2008 |
| 7405898 |
System and method for generating a position error signal (PES) reference curve in a data storage device |
Jul. 29, 2008 |
| 7397628 |
Two degree of freedom position control method, two degree of freedom position control device, and medium storage device |
Jul. 8, 2008 |
| 7349172 |
Certifying concentric data in eccentric servo data tracks of pre-formatted media |
Mar. 25, 2008 |
| 7330327 |
Servo writing a disk drive by writing discontinuous spiral tracks to prevent overheating |
Feb. 12, 2008 |
| 7319570 |
Random vibration and shock compensator using a disturbance observer |
Jan. 15, 2008 |
| 7292403 |
Low frequency disturbance compensation control device and disk drive using the same |
Nov. 6, 2007 |
| 7248426 |
Servo writing a disk drive from spiral tracks by shifting a demodulation window an integer number of sync mark intervals |
Jul. 24, 2007 |
| 7230786 |
Method and apparatus for dynamic placement of an integration window in a disk drive having a disk surface with spiral servo information written thereon |
Jun. 12, 2007 |
| 7209312 |
Self-servo-write using ramp-tracks |
Apr. 24, 2007 |
| 7196865 |
Recording apparatus having discoid record mediums |
Mar. 27, 2007 |
| 7177113 |
Magnetic recording disk drive with switchable rotational vibration cancellation |
Feb. 13, 2007 |
| 7136253 |
Method and apparatus for providing multi-point position demodulation of a read head when using spiral-written servo information |
Nov. 14, 2006 |
| 7088533 |
Method of self-servo writing in a disk drive using a spiral pattern |
Aug. 8, 2006 |
| 7079343 |
Time-based sectored servo data format |
Jul. 18, 2006 |
| 7068459 |
Adjusting track density by changing PES algorithm when servo writing a disk drive from spiral tracks |
Jun. 27, 2006 |
| 7035039 |
Magnetic head positioning control device, magnetic head certifier, magnetic disk certifier and head cartridge |
Apr. 25, 2006 |
| 7019937 |
Method and apparatus for determining a transducer's reference position in a disk drive having a disk surface with spiral servo information written thereon |
Mar. 28, 2006 |
| 7019924 |
Patterned medium and recording head |
Mar. 28, 2006 |
| 6989954 |
Demodulating servo sectors and spiral tracks using common circuitry |
Jan. 24, 2006 |
| 6987636 |
Adjusting track density over disk radius by changing slope of spiral tracks used to servo write a disk drive |
Jan. 17, 2006 |
| 6972923 |
Magnetic recording medium and magnetic recording/reproducing apparatus using the same |
Dec. 6, 2005 |
| 6950268 |
Disk drive |
Sep. 27, 2005 |
| 6947249 |
Method and apparatus for automatically determining an embedded runout correction threshold |
Sep. 20, 2005 |
| 6940680 |
Method and apparatus for head positioning control in disk drive |
Sep. 6, 2005 |
| 6937423 |
Reducing effects of rotational vibration in disk drive |
Aug. 30, 2005 |
| 6906485 |
Spindle motor control using a current profile to taper current transitions |
Jun. 14, 2005 |
| 6853513 |
Magnetic scanning system |
Feb. 8, 2005 |
| 6831804 |
Method and apparatus for handling resonance effects in disc drives using active damping |
Dec. 14, 2004 |
| 6819520 |
Use of momentum transfer actuators for motion control of flexible mechanical structures |
Nov. 16, 2004 |
| 6785075 |
Self-writing servo and clock fields on a recording medium |
Aug. 31, 2004 |
| 6760174 |
Adaptive fly height for error recovery in a disc drive |
Jul. 6, 2004 |
| 6747835 |
Method and apparatus for simultaneously measuring and calculating servo-related data |
Jun. 8, 2004 |
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