| Patent Number |
Title Of Patent |
Date Issued |
| 7336569 |
Optical disk tracking servo circuit enabled to compensate for non-continuous track segments or p |
February 26, 2008 |
| The invention pertains to an improvement for a tracking and focusing servo and defect management circuit that controls the tracking and focusing of an optical head on an optical media in an apparatus for reproducing a data, sound or image recorded on the optical media. The invention |
| 7334733 |
Data access device using rotational head to access data stored in data strips and data arc segme |
February 26, 2008 |
| This invention discloses a data card that has a plurality of data arcs and also a linear data track, e.g., a magnetic or optical data strip, disposed on a flat data storage medium. The data card may be employed as a credit card or ID card with conventional magnetic strip for storing |
| 7185814 |
Layer structure and method of manufacture for optical memory strip (OMS) |
March 6, 2007 |
| This invention discloses an optical memory strip and a data card that has at least an optical memory strip as a cutoff piece bonding and attaching to the data card for storing data accessible with an optical read/write head. The data card can further includes at least a magnetic data tra |
| 6934098 |
Data card with a full circular track for alignment and amplitude calibration |
August 23, 2005 |
| This invention discloses a flat data storage medium that includes a plurality of substantially parallel data arc-segments. The data arcs further include at least one full circle data track provided for obtaining a measurement of an average amplitude of data signals over the full circle |
| 6775080 |
Data access device implemented with open and closed control loops to access data stored in discr |
August 10, 2004 |
| This invention discloses a data access system for access data stored on a flat medium. The data access system includes a pickup head rotating over the flat medium. The data access system further includes at least one stepping motor for discretely moving the flat medium substantially alon |
| 6728059 |
Magnetic data card servo writer |
April 27, 2004 |
| This invention discloses a magnetic servo writer. The magnetic servo writer includes a magnetic pickup head for rotationally moving over and writing servo data in a magnetic flat data-storage medium. The magnetic servo writer further includes a clock head for providing clock signals to t |
| 6588671 |
Positioning of a recording head for a data storage device |
July 8, 2003 |
| This invention is a data storage system for accessing data stored in a data storage medium. The data storage system includes a motor-head assembly controlled to activate a vertical movement for loading and unloading at least a pickup head supported thereon to access the data medium in th |
| 6545831 |
Servo-sector arrangement over several data arcs for a rotational head data recording and retriev |
April 8, 2003 |
| This invention discloses a plurality of substantially parallel data arcs disposed on a flat data storage medium. The data arcs include at least two linearly aligned servo-data fields disposed in an inner data arc and an outer data arc with an inter-arc distance. The servo data field disp |
| 6502755 |
Optical data storage card |
January 7, 2003 |
| The optical data-storage card includes an optical data-storage medium layer supported on the card. The data-storage medium layer includes a plurality of data storage tracks for storing data therein. Each of the tracks having at least an arc-segment wherein each of the data storage tracks |
| 6499659 |
Pulse shaping for a transformer coupled read/write recording device |
December 31, 2002 |
| This invention discloses a data storage drive system. The system includes a pickup head for performing data access functions connected to a secondary winding of a transformer. The transformer further includes a primary winding connected to a driver controller provided with a pre-amplifie |
| 6417980 |
Magnetic data card servo writer |
July 9, 2002 |
| This invention discloses a magnetic servo writer. The magnetic servo writer includes a magnetic pickup head for rotationally moving over and writing servo data in a magnetic flat data-storage medium. The magnetic servo writer further includes a clock head for providing clock signals to t |
| 6339569 |
Optical data card servo writer |
January 15, 2002 |
| This invention discloses an optical servo writer. The optical servo writer includes an optical pickup head for rotationally moving over and writing servo data in an optical flat data-storage medium. The optical servo writer further includes a clock head for providing clock signals to the |
| 6311893 |
Optical data access system with data card reader having a single rotational moving pickup head |
November 6, 2001 |
| This invention discloses an optical data access system. The optical data access system includes an optical flat data storage medium. The optical data access system further includes a data access drive system for driving an optical pickup head for performing a rotational movement over the |
| 6307709 |
Magnetic data storage card |
October 23, 2001 |
| The magnetic data-storage card includes a magnetic data-storage medium layer adhering to the card. The data-storage medium layer includes a plurality of data storage tracks for storing data therein. Each of the tracks having at least an arc-segment wherein each of the data storage tr |
