| Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963) |
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| 02/27/1991 | EP0414579A2 A carriage servo unit in a disk player |
| 02/27/1991 | EP0414456A2 Magnetic head position control system |
| 02/26/1991 | US4996623 Laminated suspension for a negative pressure slider in a data recording disk file |
| 02/26/1991 | US4996618 Magnetic disk apparatus having additional carriage adapted to prevent adsorption of magnetic head |
| 02/26/1991 | US4996617 Disc drive safety latch using shape memory metals |
| 02/26/1991 | US4996616 Head suspension load beam with reinforcing ribs |
| 02/26/1991 | US4996614 Magnetic recording apparatus having dust removing surface feature |
| 02/21/1991 | WO1991002354A1 Disk drive system using multiple embedded quadrature servo fields |
| 02/21/1991 | WO1991002352A1 Track seek recovery system and method |
| 02/21/1991 | WO1991002351A1 Positioning system and method for flexure mounted read/write head |
| 02/21/1991 | WO1991002349A1 Architecture for 2-1/2 inch diameter single disk drive |
| 02/20/1991 | EP0412993A1 Tape drive machines. |
| 02/20/1991 | CN1049423A Linear actuator for a disk file |
| 02/19/1991 | US4995025 Spherical pivoting actuator for read/record head |
| 02/19/1991 | US4994931 Actuator structure for a magnetic head suspension assembly in a disk drive |
| 02/13/1991 | EP0412739A2 A laminated suspension for a negative pressure slider in a data recording disk file |
| 02/13/1991 | EP0412738A2 Optical disk sector servo patterns |
| 02/13/1991 | EP0412221A2 Apparatus for centering a transducer over a track of a magnetic disk |
| 02/12/1991 | US4992686 Single housing stepper motor |
| 02/12/1991 | US4992300 Manufacturing method for a recording medium or a recording head |
| 02/06/1991 | EP0411552A2 A disk drive |
| 02/06/1991 | EP0410973A1 Carrier and method of attachment for disk file head/arm assemblies. |
| 02/05/1991 | US4991045 Suspension assembly |
| 02/05/1991 | CA1279930C Method and apparatus for an improved sampled servo seek and track follow disc drive |
| 01/30/1991 | EP0393116A4 Servo pattern |
| 01/30/1991 | EP0186662B1 Self-timed runout correction pattern |
| 01/29/1991 | US4989190 Apparatus for seeking a track of an optical disk in which information is recorded |
| 01/29/1991 | US4989109 Apparatus for accurately positioning a magnetic recording and reproducing head |
| 01/29/1991 | US4988933 Data storage |
| 01/29/1991 | US4988904 Voice coil motor with an encoder |
| 01/29/1991 | CA1279725C Servo gain compensation in a disc drive |
| 01/22/1991 | US4987506 Clamping mechanism for clamping a movable carriage carrying a recording/reproducing head of an information recording/reproducing apparatus |
| 01/22/1991 | US4987355 Self-synchronizing servo control system and servo data code for high density disk drives |
| 01/16/1991 | EP0408310A2 Transducer positioning servo mechanism |
| 01/16/1991 | EP0408298A2 Head gimbal flexure assembly |
| 01/16/1991 | EP0407398A1 Removable cartridge disc drive with radial arm voice coil actuator |
| 01/15/1991 | US4985882 Track access control system for disk system, having eccentricity correction means |
| 01/15/1991 | US4985793 Voice coil activated disk drive parking device with magnetic bias |
| 01/15/1991 | US4984901 Magnetic recording disc having sector reference zone, device for reading same, and magnetooptical memory optoelectronic employing said device |
| 01/10/1991 | CA2019318A1 Head gimbal flexure assembly |
| 01/09/1991 | EP0407215A2 Optical recording and reproducing apparatus |
| 01/09/1991 | EP0406264A1 Ceramic support arm for movably positioning transducers |
| 01/08/1991 | US4984115 Rotary actuator and bearing support therefor |
| 01/08/1991 | US4984114 Flying head slider |
| 01/08/1991 | US4984104 Apparatus for recording an information signal at a second part of a given track by sampling and holding a tracking control signal used for tracking at a first part of the given track |
| 01/02/1991 | EP0404942A1 Optical disk and movement control of its optical spot |
| 01/01/1991 | US4982391 Method and apparatus for accessing a desired track of a recording medium during a stopped state of recording or reproduction |
| 01/01/1991 | US4982300 Restrictively damped actuator mount for disc drives |
| 01/01/1991 | US4982299 Linear motor locking mechanism in a disc unit |
| 01/01/1991 | US4982298 Adaptive velocity profile system for a disk drive head |
| 01/01/1991 | US4982297 Head positioning system for compensating for erroneous detection of recorded position error information |
| 01/01/1991 | US4982296 Head and disk assembly for fixed disk drive |
| 01/01/1991 | US4982295 Method for centering a read/write head of a magnetic data storage apparatus on a track of a magnetic disk |
| 01/01/1991 | US4982146 Stepping motor driving device |
| 01/01/1991 | US4982074 Method of recording position information of last track recorded with data in directory area |
| 12/27/1990 | CA1278377C Track following servo for higher density disk files |
| 12/25/1990 | US4980876 In a disk storage system |
| 12/25/1990 | US4980784 Magnetic disk apparatus |
| 12/19/1990 | EP0403196A2 Optical information recording-reproducing apparatus provided with a plurality of sample hold circuits |
| 12/19/1990 | EP0328556A4 Spherical pivoting actuator for read/record head |
| 12/18/1990 | US4979063 Design for an actuator arm for a disc drive |
| 12/18/1990 | US4979059 System for storing data in a separate memory when the number of positioning errors of a magnetic disc exceeds a threshold |
| 12/12/1990 | EP0401973A2 Reliable track crossing detection in data storage apparatus |
| 12/11/1990 | US4977554 Slider-position detector for detecting the position of the slider of a disk player |
| 12/11/1990 | US4977472 Servo address system |
| 12/11/1990 | US4977469 Signal reproducing device which offsets the tracking error signal |
| 12/05/1990 | EP0400949A2 Disc loading apparatus |
| 12/05/1990 | EP0400946A2 Head mounting structure for high capacity disk drive |
| 12/05/1990 | EP0400923A2 A disk drive unit and method of control |
| 12/05/1990 | EP0400755A1 Digital transmission system using subband coding of a digital signal |
| 12/05/1990 | EP0400678A2 Signal recording/reproducing apparatus |
| 12/05/1990 | EP0400222A1 Digital transmission system using subband coding of a digital signal |
| 12/04/1990 | US4975795 Electrical connection for a self-loading head assembly for disk drives |
| 12/04/1990 | CA1277420C Disc reproducing apparatus |
| 11/29/1990 | WO1990014661A1 Non-contact magnetic head assembly for a flexible medium disk drive |
| 11/29/1990 | WO1990014659A1 Magnetic latch for disk drive actuator |
| 11/28/1990 | EP0399513A1 Pit pattern detecting method |
| 11/28/1990 | EP0399225A1 Track jumping method |
| 11/27/1990 | US4974222 Slider-position detector for detecting the position of the slider of a disk player |
| 11/27/1990 | US4974107 High performance linear actuator for memory storage device |
| 11/27/1990 | US4974106 Non-contact magnetic head assembly for a flexible medium disk drive |
| 11/27/1990 | US4974103 High density disc drive with magnetic clutch for use with a sealed removable cartridge |
| 11/27/1990 | CA1277030C Linear motor |
| 11/22/1990 | EP0398656A2 Electric charge image recording medium and recording/reproducing apparatus |
| 11/22/1990 | EP0397896A1 Low profil magnetic head suspension |
| 11/22/1990 | DE4015682A1 Position control circuitry for read-write heads with magnetic discs - uses electronic PID circuits with variable gain amplifies in conjunction with reference marks on disc |
| 11/22/1990 | DE4009476A1 Magnetplattengeraet-steuervorrichtung Magnetplattengeraet-control device |
| 11/20/1990 | US4972399 Apparatus and method for accessing a disk characteristic data recording area of an optical disk |
| 11/20/1990 | US4972350 Position mode track seek servo for high capacity disk drive system |
| 11/20/1990 | US4972282 Head carriage mechanism of a magentic disc drive including a wear resistance, low friction slide member |
| 11/20/1990 | US4972281 Magnetic head supporting device for flexible recording medium |
| 11/20/1990 | US4972280 Support construction for the transducer of a magnetic head assembly |
| 11/20/1990 | US4972132 Stepping motor drive control circuit for a magnetic disk drive |
| 11/15/1990 | DE4005658A1 Kompatibles abspielgeraet fuer bildplatten verschiedener systeme Compatible player for picture discs of various systems |
| 11/14/1990 | EP0397322A2 An actuator magnetic circuit and method therefore |
| 11/14/1990 | EP0397234A1 Apparatus for reading an information pattern from a record carrier and signal-processing circuit for use in such apparatus |
| 11/14/1990 | EP0397118A2 Disc control apparatus and operating method thereof |
| 11/14/1990 | CN1010443B Data storage apparatus |
| 11/13/1990 | CA1276290C Video signal reproducing apparatus using pilot signal system |
| 11/08/1990 | DE4013933A1 On-off track detection for universal disc system - is based upon comparison of signal envelope to identify track condition |