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Class Information
Number: 369/43
Name: Dynamic information storage or retrieval > With servo positioning of transducer assembly over track combined with information signal processing
Description: Subject matter having closed-loop control of the alignment between the transducer assembly and the information storage track combined with handling of the information signal.

Sub-classes under this class:

Class Number Class Name Patents
369/44.11 Optical servo system 475

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8446802 Optical drive device and focus servo control method May. 21, 2013
8424856 Clamp with removable jaw Apr. 23, 2013
8274252 Motor control apparatus Sep. 25, 2012
8090906 Dynamic processor bandwidth allocation in response to environmental conditions Jan. 3, 2012
7965589 Recordable disc and motor Jun. 21, 2011
7767255 Information storage medium with laterally magnetised dot array, and process for producing said medium Aug. 3, 2010
7598499 Charged-particle exposure apparatus Oct. 6, 2009
7546003 Suspension board with circuit and producing method thereof Jun. 9, 2009
7421359 Detecting back electromotive force voltage Sep. 2, 2008
7420895 Signal detection method and apparatus and optical recording and/or reproducing apparatus using the same Sep. 2, 2008
RE40413 Method and apparatus for developing a dynamic servo signal from data Jul. 1, 2008
7319224 Semiconductor probe with resistive tip and method of fabricating the same Jan. 15, 2008
7317206 Conductive elements for thin film transistors used in a flat panel display Jan. 8, 2008
7301690 Micro-optical arrangement Nov. 27, 2007
7254525 Method and apparatus for automated analysis of hard disk drive performance Aug. 7, 2007
7206106 Holographic ROM reader having servo control Apr. 17, 2007
7009791 Position detecting method, information recording/reproducing device and information recording medium Mar. 7, 2006
6947233 Disk drive apparatus and method for compensating for error in servo-information-recorded position between heads Sep. 20, 2005
6873492 Magnetic media with readable topographical features in combination with a slider-mounted non-magnetic transducer Mar. 29, 2005
6839194 Disk drive apparatus and method for generating servo sector pulse Jan. 4, 2005
6762402 Apparatus for recording and reading data and method of recording and reading data using contact resistance measurement thereof Jul. 13, 2004
6680884 Apparatus and method for scanning a rotating information carrier Jan. 20, 2004
6564009 Apparatus for recording and/or reproducing data onto and/or from an optical disk and method thereof May. 13, 2003
6525897 Apparatus for developing a dynamic servo signal from data in a magnetic disc drive and method Feb. 25, 2003
6459940 Closed-loop compensation for kinematic error in harmonic driver for precision control applications Oct. 1, 2002
6452990 Synchronous detection of wide bi-phase coded servo information for disk drive Sep. 17, 2002
6421307 Optical device Jul. 16, 2002
6388413 Head switch seek on disc drives with multiple recording heads May. 14, 2002
6381088 Apparatus for developing a dynamic servo signal from data in a magnetic disc drive and method Apr. 30, 2002
6353397 Method and device for switching between different types of output signals of a position measuring system Mar. 5, 2002
6307689 Optical head and drive device for optical recording medium Oct. 23, 2001
6236032 Tracking pull-in circuit for reducing effect by a defect in a tracking servo loop May. 22, 2001
6218086 Method of forming ultrasmall structures and apparatus therefor Apr. 17, 2001
6154326 Optical head, disk apparatus, method for manufacturing optical head, and optical element Nov. 28, 2000
6137753 Runout calibration for disc drive system Oct. 24, 2000
6088662 Thermoelectric temperature sensing system in a computer hard disc drive Jul. 11, 2000
6043768 Device and method for switching between different operating modes of a transducer Mar. 28, 2000
5953513 Recording and reproducing device for recording and reproducing information from different kinds of storage media having different sector formats Sep. 14, 1999
5808977 Tracking method and recording means thereby Sep. 15, 1998
5780982 Method of and apparatus for controlling rotation number of motor Jul. 14, 1998
5764613 optical pickup apparatus Jun. 9, 1998
5621709 Tracking servo apparatus Apr. 15, 1997
5566145 Head tracking system in a disk drive Oct. 15, 1996
5537372 High density data storage system with topographic contact sensor Jul. 16, 1996
5521891 Speed detection apparatus, speed control motor, and track jump control circuit May. 28, 1996
5485445 Disc driving apparatus having means for placing a read record head at a predetermined position in the innermost region of a disc Jan. 16, 1996
5420841 Spindle motor control circuit for optical recording and regenerating system May. 30, 1995
5402280 Method and apparatus for runout correction due to disk slip or spindle imbalance Mar. 28, 1995
5384524 Voice coil motor control circuit and method for servo system control in a computer mass storage device Jan. 24, 1995
5375114 Recording and reading space control between a read/write probe and a recording medium Dec. 20, 1994

1 2 3 4 5 6

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