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| Number | Title | Issue Date |
| 6938121 | Disk storage system having an electronic circuit mounted on the surface of the disk and control method thereof The present invention provides a control method of a rotary storage medium having an electronic circuit that controls connection between an electronic circuit block and an external apparatus to enhance the performance of the entire system, and a system thereof. The ... | 08/30/2005 |
| 6772272 | Apparatus and method for writing information to a designated information storage medium with an allocated data storage device using a specified information recording format A method to write information to a designated information storage medium using an allocated data storage device using a specified information recording format, whereby a previously-determined media bit for the designated information storage medium is examined, and a... | 08/03/2004 |
| 6593014 | Thermomagnetic recording medium, thermomagnetic recording and reproducing method, and thermomagnetic recording and reproducing device A thermomagnetic recording medium includes a thermal change layer whose thermal conductivity is induced to change by a metal-to-insulator transition, is greater on a lower temperature side of a transition temperature and is smaller on a higher temperature... | 07/15/2003 |
| 6480458 | Apparatus for driving a movable body An apparatus for driving a movable body, comprises a driving power source having an output shaft; and a driving gear provided on the output shaft to drive the movable body. The driving gear is capable of slipping relative to the output shaft of the drivin... | 11/12/2002 |
| 6442658 | Method and apparatus for improving playback of interactive multimedia works The present invention comprises a system for delivering an interactive multimedia work from a storage device, for example a hard disk drive, a CD-ROM drive, a network server, etc. to a playback device, for example a personal computer, in a manner that pro... | 08/27/2002 |
| 6373804 | CD/cassette playing mechanism A CD/cassette playing mechanism includes a CD playing module and a cassette playing module supported on a chassis. The CD playing module includes a CD spindle for supporting a CD and a laser head on one side of the CD spindle for reading the CD. The casse... | 04/16/2002 |
| 6292443 | Information recording apparatus and method for playing a plurality of information recording mediums An optical disc drive control apparatus according to the present invention comprises a disc drive into or from which various optical discs are inserted or ejected. The system includes a first memory for storing various players that play back various optic... | 09/18/2001 |
| 6220964 | Game system operable with backup data on different kinds of game machines A game system utilizes a first game machine and a second game machine. The backup data obtained through playing a first game on the first game machine is memorized in a first game cartridge. The first game cartridge is attached to an extension adapter, an... | 04/24/2001 |
| 6131138 | Variable speed compact disc drive including an elastic buffer The present invention provides an improved disc drive. In one embodiment of the present invention a disc drive capable of spinning a disc, which contains more than one type of data is disclosed. A first type of data is associated with a first speed, and a... | 10/10/2000 |
| 6128712 | Method and apparatus for improving playback of interactive multimedia works The present invention comprises a system for delivering an interactive multimedia work from a storage device, for example a hard disk drive, a CD-ROM drive, a network server, etc. to a playback device, for example a personal computer, in a manner that pro... | 10/03/2000 |
| 6030745 | Optical recording process An optical recording medium comprising: a substrate having pre-groove for forcing and tracking servo operation; and a recording film formed on the substrate, the recording film having optical properties being changed by applying at least one of a light be... | 02/29/2000 |
| 6026446 | Method for interleaving data for seamless playback of multiple program versions having common material A method for formatting digital data on an optical disk that represents at least two versions of the same program. Data sequences which are unique to each version and data sequences which are common to the two of them are interleaved in a single data stre... | 02/15/2000 |
| 5914212 | Optical recording process An optical recording medium comprising a substrate having a pre-groove for focusing and tracking servo operation, and a recording film formed on the substrate, the recording film having optical properties which change in response to the application of at ... | 06/22/1999 |
| 5809520 | Interchangeable cartridge data storage system for devices performing diverse functions A system for exchanging digital data among a plurality of hand-held computer devices. Digital signals are written by a first hand-held device to a mini-cartridge that mini-cartridge is inter-operable among a class of hand-held devices, each of which is eq... | 09/15/1998 |
| 5726963 | Information reproduction apparatus including a phase compensation circuit for eliminating the influence of AC-coupling An information reproduction apparatus is provided with a reproduction signal processing system for reproducing digital information recorded on an information track of a recording medium by a pit edge recording method and for reproducing the digital inform... | 03/10/1998 |
| 5699547 | Information retrieval system with serial access data storage and random access data retrieval An information retrieval system in which information is stored in digital form in a serial access device such as a digital VCR, the information being organized as a library of successive albums, each album having successive tracks of individually identifi... | 12/16/1997 |
| 5689489 | Compact disc and floppy disc compatible drive and a driving method thereof A compact disc and floppy disc compatible driver and a driving method thereof, in which a structure is improved for simultaneously driving a floppy disc and a compact disc including commodities of applying a compact disc such as a CD, CD-ROM and video CD ... | 11/18/1997 |
| 5679474 | Overwritable optomagnetic recording method and medium having a layer with curie temperature which varies in the thickness direction A magneto-optical recording medium with wide operating margins is disclosed. The magneto-optical recording medium includes a vertical magnetic films of exchange-coupled liminated structure composed of a first magnetic layer with a high coercive force H | 10/21/1997 |
| 5664141 | Disk drive system using received address for selecting disk processing format A host computer transmits to a disk drive an address or an ID number representing a disk to be used, and the disk drive receives from the host computer the address or ID number representing the disk to be used, wherein when the received address or ID numb... | 09/02/1997 |
| 5604720 | Method and apparatus for accessing a target track on optical medium For recording or reproduction of information, the optical beam is moved relative to the recording medium along the longitudinal direction of a certain track. When accessing another track, the relative movement of the light beam along the longitudinal dire... | 02/18/1997 |
| 5561643 | Tracking system for use in regular and high density optical recording mediums A high-density recording medium has data tracks and guide tracks formed on both sides of each of the data tracks. Intervals between the guide tracks are set in such a manner that the outer edges of two adjacent guide tracks correspond in position to two t... | 10/01/1996 |
| 5553036 | Apparatus and method for writing and reading digital information on a magnetic memory including a superconducting material An apparatus and a method for writing and reading digital information on a magnetic memory are disclosed. In the apparatus, no mechanical contact between the memory and a magnetic detection means is made because the magnetic state of a respective domain i... | 09/03/1996 |
| 5544133 | Recording/reproducing apparatus using optical magnetic tape A recording/reproducing apparatus using optical magnetic tape, comprises an objective lens for focusing the light generated from a light source, and an acousto optic scanner and an ultrasonic wave generator for vertically or horizontally displacing the fo... | 08/06/1996 |
| 5530686 | Record carrier having a track including audio information and additional non-audio information, and apparatus for reading and/or reproducing certain of the information included in such a track A record carrier having addressable information included thereon, including at least one track having audio information and additional non-audio information (e.g., CD-I information), and apparatus for reading and/or reproducing certain of the information ... | 06/25/1996 |
| 5439755 | Magnetic recording medium comprising a magnetic recording layer, an intermediate layer, a metallic thermal recording layer and a protective layer This invention provides a magnetic recording medium wherein visible patterns can be written, in which a heat sensitive layer is formed on a magnetic recording layer and a metallic thin layer is formed on said heat sensitive layer. The metallic thin layer ... | 08/08/1995 |
| 5425079 | Telephone power interruption data backup apparatus A data backup apparatus for temporarily storing the data stored in a volatile memory using an internal battery when the main power is stopped. When the operation of the internal battery is started, the data stored in the volatile memory as a digital signa... | 06/13/1995 |
| 5400308 | Optical information recording/reproducing device capable of recording information on a moving medium and reproducing information by using reproducing light beams According to the optical information recording/reproducing device of the present invention, upon recording of information, when a pit image on an optical detector which is formed by a recording optical beam spot at an information recording time arrives at... | 03/21/1995 |
| 5392271 | Concurrent recording and reproducing optical disc and optical head apparatus for the same A concurrent recording and reproducing optical disc has a magneto-optical medium film coated on a ROM disc having rows of pits. The magneto-optical film is arranged by a predetermined interval between the two adjacent rows of the pit rows. The predetermin... | 02/21/1995 |
| 5371723 | Recording and reproducing system for use with different arrangements of optical cards An apparatus for recording and/or reproducing information on and/or from an optical card, including a plurality of control system units and a driving system unit; in addition the control system units are arranged to be exchangeable. A user selects one of ... | 12/06/1994 |
| 5191573 | Method for transmitting a desired digital video or audio signal The present invention is a method for transmitting a desired digital video or audio signal stored on a first memory of a first party to a second memory of a second party. The method comprises the steps of transferring money via a telecommunications line t... | 03/02/1993 |
| 5119353 | Compact disc with additional memory addressable by disc player A compact disc (CD) or CD-ROM disc having at least one surface region containing a field of digitally encoded, reproducible data, outside of a central region of the disc is provided with a second non-volatile read/write memory IC chip or memory device, e.... | 06/02/1992 |
| 5105314 | Multiple audio signal processing system A multiple audio signal processing system is disclosed which comprises: a composite system combining a digital audio tape recorder and a compact disc player; a system controller for controlling the operation of the composite system in accordance with the ... | 04/14/1992 |
| 4937807 | System for encoding sound recordings for high-density storage and high-speed transfers Method and apparatus for addressably writing digital representations of high-fidelity sound recordings in a non-mapped digital storage device, such as a CD music ROM, using conventional PCM (pulse code modulated) equipment, but in a more condensed and eff... | 06/26/1990 |
| 4858218 | Optical recording medium and reproducing apparatus Apparatus for reproducing recorded information applies a linearly polarized light beam to a recording medium having first and second recorded information tracks. The recording medium is formed so that the intensity of reflected light relative to the incid... | 08/15/1989 |
| 4723181 | Tape memory with integral disk index on reel A peripheral memory controller controls a helical scan magnetic tape recorder so as to record and play back data files in parallel tracks on a magnetic tape. The tape is contained in a cassette having a magnetic disk fixably mounted on one reel of the cas... | 02/02/1988 |
| 4641203 | Apparatus for storing and relating visual data and computer information A system which combines a video tape recorder with a computer in such a manner that these two components each automatically record and display where related information is stored in its own mechanism as well as in its counterpart mechanism. This allows th... | 02/03/1987 |
| 4321635 | Apparatus for selective retrieval of information streams or items A video disc player for use with a record disc having recorded along a spiral track thereon a succession of information streams to be reproduced and a series of addresses identifying the successive turns of the track. Also recorded on the record disc, pri... | 03/23/1982 |
| 3934883 | Disk record player A disk record player having no turntable or spindle and driveable from a conventional magnetic tape player. The record disk is held in position and rotated by circumferentially engaged rollers, each roller having a circumferential groove. The unit can be ... | 01/27/1976 |
