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Browse by Category: Main > Information Technology
Class Information
Number: 360/77.05
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track centering > Rotary carrier > By servo signal component from carrier surface separate from information signal bearing surface
Description: Subject matter wherein the record carrier includes two surfaces one of which has a continuous path along which an information signal is stored and the other has a continuous path along which at least a component of a transducer head positioning servo control signal is stored.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8542458 Magnetic disk drive and method for controlling microactuator in magnetic disk drive Sep. 24, 2013
8441754 Servo pattern transfer May. 14, 2013
8437100 Flexure based shock and vibration sensor for head suspensions in hard disk drives May. 7, 2013
8179629 Flexure based shock and vibration sensor for head suspensions in hard disk drives May. 15, 2012
8090906 Dynamic processor bandwidth allocation in response to environmental conditions Jan. 3, 2012
8064155 Storage apparatus Nov. 22, 2011
7771852 Magnetic recording disk with patterned nondata islands of alternating polarity Aug. 10, 2010
7746594 Disk drive comprising slanted line servo burst sets offset radially Jun. 29, 2010
7688542 Method to identify short spirals Mar. 30, 2010
7667910 Magnetic disk drive, servo writer, self-servo writer and methods for use therewith Feb. 23, 2010
7633697 Magnetic disk drive, servo writer, self-servo writer and methods for use therewith Dec. 15, 2009
7463438 Information storage apparatus, and control method and program for the same Dec. 9, 2008
7423835 Method and apparatus for servo control using spiral servo information in a disk drive Sep. 9, 2008
7403355 Information recording medium, recording/reproducing apparatus, and stamper Jul. 22, 2008
7382566 Magnetic disk protection mechanism, computer system comprising protection mechanism, protection method for magnetic disk, and program for protection method Jun. 3, 2008
7283320 Magnetic recording medium including servo and data bands in the magnetic layer Oct. 16, 2007
7250738 Nonlinear hysteresis control system Jul. 31, 2007
7245448 Information recording apparatus and data writing control device therefor Jul. 17, 2007
7242546 Determining a location based on a cyclic bit sequence containing consecutively-placed identical bit-groups Jul. 10, 2007
7212372 Magnetic tape and magnetic tape cartridge May. 1, 2007
7199956 Disk drive self-servo writing using fundamental and higher harmonics of a printed reference pattern Apr. 3, 2007
7158336 Window timing adjustment for spiral bursts Jan. 2, 2007
7126780 Method, system, and article of manufacture for self-servowriting a disk Oct. 24, 2006
7092184 Monitoring a sensor's output using a target window that is based on a longitudinal offset's position-dependent indicator Aug. 15, 2006
7016132 Magnetic data embedding system Mar. 21, 2006
6954318 Magnetic data embedding apparatus having checking function Oct. 11, 2005
6952322 Disk drive reading servo sectors recorded at a relative offset on multiple disk surfaces to increase the servo sample rate Oct. 4, 2005
6943981 Methods for improving servo-demodulation robustness Sep. 13, 2005
6934112 Method for obtaining head positions in magnetic data writing apparatus Aug. 23, 2005
6906485 Spindle motor control using a current profile to taper current transitions Jun. 14, 2005
6765748 Method of interleaving servo information fields for track following and seeking and a recording medium including interleaved servo information fields Jul. 20, 2004
6735040 Servo flaw detection using PES and velocity thresholds May. 11, 2004
6735031 Method for storage of self-servowriting timing information May. 11, 2004
6732292 Adaptive bi-directional write skip masks in a data storage device May. 4, 2004
6714371 Method and disk drive for shock estimation and write termination control Mar. 30, 2004
6693763 Method for linearizing microactuator hysteresis for a disc drive Feb. 17, 2004
6567233 4-D shock-sensing for hard-disk drives May. 20, 2003
6563673 Method and apparatus for minimizing slider fly heights over patterned media May. 13, 2003
6476997 Disk device, track positioning method and method for generating a position error signal Nov. 5, 2002
6396654 Embedded servo writing method and apparatus for hard disk drive May. 28, 2002
6385000 System and method for extending the operating life of a magnetoresistive transducer provided in a disk drive system May. 7, 2002
6377416 A/D with digital PLL Apr. 23, 2002
6292318 Disc recording/reproducing apparatus and medium having spiral data track Sep. 18, 2001
6285522 Rotational vibration compensation using a dedicated surface with a constant frequency pattern Sep. 4, 2001
6130798 Hardware PES calculator Oct. 10, 2000
6118615 Apparatus for positioning head of magnetic storage device Sep. 12, 2000
6079043 Magnetic disk apparatus Jun. 20, 2000
6064541 Servo pattern writing method for magnetic disk drives, and magnetic disk drive adopting the method May. 16, 2000
6058335 Automated technique for manufacturing hard disk drive May. 2, 2000
6040955 Self servo writing file Mar. 21, 2000

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