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Class Information
Number: 360/77.03
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track centering > Rotary carrier > By nonmagnetic sensing (e.g., optical, capacitive)
Description: Subject matter responsive to a signal produced in response to a property of the record carrier other than a magnetic property, or by a nonmagnetic auxiliary element.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| RE40975 |
Head suspension with resonance feedback transducer |
Nov. 17, 2009 |
| 7602577 |
Rapid off track detection using in-drive microactuator |
Oct. 13, 2009 |
| 7555947 |
Air pressure sensor |
Jul. 7, 2009 |
| 7529057 |
Servo loop employing correction vector from a secondary disturbance sensor to minimize correlation between servo loop error and disturbance sensor output |
May. 5, 2009 |
| 7495857 |
Servo writing a disk drive by writing spiral tracks using a mechanical position sensor |
Feb. 24, 2009 |
| 7480116 |
Disk drive employing coarse position feedback from mechanical position sensor to improve format efficiency |
Jan. 20, 2009 |
| 7468857 |
Acceleration feed-forward correction enabled or disabled based on track follow loop signals |
Dec. 23, 2008 |
| 7450335 |
Reducing read/write head track misregistration |
Nov. 11, 2008 |
| 7423833 |
Servo loop employing correction vector from a secondary disturbance sensor to minimize correlation between servo loop error and disturbance sensor output |
Sep. 9, 2008 |
| 7405896 |
Method and apparatus for detecting slider/disk fly-height modulation in a hard disk drive |
Jul. 29, 2008 |
| 7365932 |
Disk drive comprising an optical sensor for vibration mode compensation |
Apr. 29, 2008 |
| 7359138 |
Method of feedback control for active damping of slider air bearing vibrations in a hard disk drive slider |
Apr. 15, 2008 |
| 7321476 |
Method and system for determining contact potential in a hard disk drive |
Jan. 22, 2008 |
| 7277252 |
Method of feedback control for active damping of slider air bearing vibrations in a hard disk drive slider |
Oct. 2, 2007 |
| 7265931 |
Apparatus to reject disk drive disturbance |
Sep. 4, 2007 |
| 7256586 |
Method and device for measuring the repeatable and non-repeatable runout of rotating components of a spindle motor |
Aug. 14, 2007 |
| 7221528 |
Magnetic alignment marking of hard disks |
May. 22, 2007 |
| 7215500 |
Feedback control mechanism for active damping of slider air bearing vibrations in a hard disk drive slider |
May. 8, 2007 |
| 7215504 |
Disk drive using an optical sensor to detect a position of an actuator arm |
May. 8, 2007 |
| 7199960 |
Disk drive with AC exciter for head/disk interface |
Apr. 3, 2007 |
| 7193806 |
Feedback control mechanism for active damping of slider air bearing vibrations in a hard disk drive slider |
Mar. 20, 2007 |
| 7149047 |
Heating/cooling based system for obtaining a disc drive servo signal |
Dec. 12, 2006 |
| 7139152 |
Servo methods and systems using existing data structures and optical masks |
Nov. 21, 2006 |
| 7102845 |
Servo methods and systems using existing data structures and medium edge position |
Sep. 5, 2006 |
| 7088546 |
Method to reject disk drive disturbance |
Aug. 8, 2006 |
| 7082006 |
Compact optical tracking system for magnetic tape |
Jul. 25, 2006 |
| 7075746 |
Disk drives and disk drive containing devices that include a servo frequency generator and spindle control timer that compensate for disk eccentricity |
Jul. 11, 2006 |
| 7064913 |
Enhanced read margining using dither enhanced write marginalization for mass data storage applications |
Jun. 20, 2006 |
| 7054095 |
Displacement detection apparatus, and magnetic recording apparatus and encoder using the displacement detection apparatus |
May. 30, 2006 |
| 7050259 |
High precision servo track writing with position error signal feedback |
May. 23, 2006 |
| 7035034 |
Data storage device, control device, off-track control method, and control method |
Apr. 25, 2006 |
| 7035038 |
Magnetic disk unit |
Apr. 25, 2006 |
| 7012777 |
Disk drive with capacitance sensing of disk vibration and feedforward control for removal of read/write head track misregistration |
Mar. 14, 2006 |
| 7009791 |
Position detecting method, information recording/reproducing device and information recording medium |
Mar. 7, 2006 |
| 6977791 |
Media servowriting system |
Dec. 20, 2005 |
| 6977786 |
Information recording method using a vertical magnetic system |
Dec. 20, 2005 |
| 6963463 |
Rotational vibration velocity-based sensor for disk drives |
Nov. 8, 2005 |
| 6961200 |
Optical servo track identification on tape storage media |
Nov. 1, 2005 |
| 6940681 |
Optical to magnetic alignment in magnetic tape system |
Sep. 6, 2005 |
| 6940678 |
Magnetic alignment marking of hard disks |
Sep. 6, 2005 |
| 6940676 |
Triple push-pull optical tracking system |
Sep. 6, 2005 |
| 6937421 |
Patterned media having offset tracks |
Aug. 30, 2005 |
| 6937423 |
Reducing effects of rotational vibration in disk drive |
Aug. 30, 2005 |
| 6930850 |
Head clamping apparatus for magnetic disk tester and magnetic disk tester |
Aug. 16, 2005 |
| 6924958 |
Read/write transducer for hard disk drives with optical position measuring system, and manufacturing process thereof |
Aug. 2, 2005 |
| 6922303 |
Reaction mass dual-stage actuator (DSA) and sensor |
Jul. 26, 2005 |
| 6920010 |
Magnetic recording apparatus |
Jul. 19, 2005 |
| 6906485 |
Spindle motor control using a current profile to taper current transitions |
Jun. 14, 2005 |
| 6898046 |
Method and system for rotational velocity-based algorithm for vibration compensation in disk drives |
May. 24, 2005 |
| 6888694 |
Active control system and method for reducing disk fluttering induced track misregistrations |
May. 3, 2005 |
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