| Patents for G11B 11 - Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups or by different subgroups of group; Record carriers therefor (14,351) |
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| 05/26/1998 | US5757733 Optical disc system having an objective lens with a numerical aperture related to the thickness of the protective layer |
| 05/26/1998 | US5757421 Method and apparatus for encoding moving picture signals and recording moving picture signals |
| 05/26/1998 | US5756202 Super resolution data storage; direct overwrite |
| 05/19/1998 | US5754649 Video media security and tracking system |
| 05/19/1998 | US5754648 Video media security and tracking system |
| 05/19/1998 | US5754522 Method for forming disk, disk forming apparatus, data recording/reproducing method, data recording/reproducing apparatus, and disk capable of recording/reproducing data in high density |
| 05/19/1998 | US5754514 Phase controlled evanescent field systems and methods for optical recording and retrieval |
| 05/19/1998 | US5754509 Disc device having heads mounted on the housing and movable in a radial direction |
| 05/19/1998 | US5754500 Comprising alloy multilayer; easy magnetization; computer disks |
| 05/19/1998 | US5754368 Suspension, slider-suspension assembly, assembly carriage device and manufacturing method of suspension |
| 05/19/1998 | US5753334 Optical recording medium |
| 05/19/1998 | US5753091 Carrier palette for substrates of optical storage media |
| 05/13/1998 | CN1181586A Magneto-optical disk |
| 05/13/1998 | CN1181579A Information recording method and its device |
| 05/13/1998 | CN1181576A Optical pickup device with plurality of laser couplers |
| 05/13/1998 | CN1181359A Crystallized glass for substrate of information-recording disk |
| 05/12/1998 | US5752009 Recording medium for electronic publications including multiple format emulation |
| 05/12/1998 | US5751689 Information recording medium |
| 05/12/1998 | US5751683 Nanometer scale data storage device and associated positioning system |
| 05/12/1998 | US5751682 Compact size magneto-optical head with a hologram and a beam splitting means |
| 05/12/1998 | US5751678 Dubbing system |
| 05/12/1998 | US5751677 Magnetio optical disk recording device capable of verifying recorded state during recording and checking erased state during erasing |
| 05/12/1998 | US5751670 Magneto-optical disk having variable thickness recording layer but adequate uniform reflectance value |
| 05/12/1998 | US5751669 Overwritable magnetooptical recording method in which the recording medium is cooled after irradiation |
| 05/12/1998 | US5751491 Method of adjusting beam axis of optical pick-up |
| 05/12/1998 | US5750274 Multilayer magnetooptic recording media |
| 05/12/1998 | US5750238 Electrostatic information recording medium |
| 05/07/1998 | DE19747405A1 Magneto-optical record carrier |
| 05/06/1998 | EP0840310A2 Magneto-optical disc |
| 05/06/1998 | EP0840309A2 Optical disc system having current monitoring circuit with controller for laser driver and method for operating same |
| 05/06/1998 | EP0840308A1 Recording medium, information reproducing device, information recording device, and information recording/reproducing device |
| 05/06/1998 | EP0840305A2 Optical apparatus |
| 05/06/1998 | EP0840304A1 Focusing servo system and focus servo acquisition enable method |
| 05/06/1998 | EP0840301A2 Isolation apparatus for use in disc drive system to mitigate effects of undesired mechanical forces and disc drive system including same |
| 05/06/1998 | EP0840300A2 Optical disc system having improved circuitry for performing blank sector check on readable disc and method for operating same |
| 05/06/1998 | EP0840296A2 Recording medium |
| 05/06/1998 | CN1181153A Spare and calibration sector management for optical worm media |
| 05/06/1998 | CN1180888A Data recording apparatus and method and recording medium |
| 05/05/1998 | US5748600 Rotational optical head for optical recording medium |
| 05/05/1998 | US5748593 Data reproduction apparatus |
| 05/05/1998 | US5748583 Information recording/reproducing apparatus with counter means accessible by system and servo processing units |
| 05/05/1998 | US5748581 Optical head of an optical disc recording/reproducing apparatus having a polygonal prism |
| 05/05/1998 | US5748579 Optical pickup for magneto optical recording apparatus |
| 05/05/1998 | US5748578 Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same |
| 05/05/1998 | US5748576 Apparatus for recording and/or reproducing a recording medium having data control function |
| 05/05/1998 | US5748574 Double focal-point magneto-optic pick-up head |
| 05/05/1998 | US5748573 Magnetic head driving circuit, including magnetic head coil switching circuits and a control pulse generator for the switching circuits, which is operable with recording data transferred at a higher than normal transfer rate |
| 05/05/1998 | US5748572 Magneto-optical recording apparatus with an optical element providing a high C/N ratio |
| 05/05/1998 | US5747136 High-density magneto-optic disk and method of manufacturing the same |
| 04/29/1998 | EP0838815A2 Apparatus and system for recording on a magnetooptical recording medium |
| 04/29/1998 | EP0838814A2 Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same |
| 04/29/1998 | EP0838811A2 Analog to digital converter and assembly to normalize servo error signals and multiplex reference voltage inputs and digital outputs and optical drive system including same |
| 04/28/1998 | US5745473 Multiple data layer optical disk with recorded information identifying the type of tracking |
| 04/28/1998 | US5745468 Mark edge recorded signal reproducing device for use in optical disk apparatus |
| 04/28/1998 | US5745466 Objective lens drive apparatus for a recording and reproducing different discs of different format |
| 04/28/1998 | US5745464 Edge position data reproduction apparatus |
| 04/28/1998 | US5745462 Recording apparatus having a recording operation controlled based upon silent portions of inputting data |
| 04/28/1998 | US5745461 Method and a system of optical disk auto-discrimination |
| 04/28/1998 | US5745451 Disc recording and/or reproducing apparatus |
| 04/28/1998 | US5745450 Focusing servo system and focus servo acquisition enable with multiple velocity acquisition modes |
| 04/28/1998 | US5745449 Optical information recording/reproducing method and apparatus for determining a relative tracking offset amount of light spots on a recording medium to perform tracking control |
| 04/28/1998 | US5745443 Magneto-optical disc having a protective film with minimal projections and method of production of same |
| 04/28/1998 | US5745265 Optical element utilized for optical storage unit and optical device including the optical element |
| 04/28/1998 | US5744792 Hybrid information recording medium |
| 04/28/1998 | CA2003158C Optical information recording medium and recording/reproducing system |
| 04/23/1998 | WO1998016929A1 Digital recording method, digital disk, digital disk recording device, and digital disk reproducing device |
| 04/23/1998 | WO1998009392A3 System and method of using optical fibers in a data storage and retrieval system |
| 04/22/1998 | EP0837464A2 Magneto-optical recording medium |
| 04/22/1998 | CN1179588A Information recording and reproduction apparatus carrying out recording and reproduction of information using laser beam |
| 04/21/1998 | US5742581 Transmissive optical and magneto-optical data storage media |
| 04/21/1998 | US5742578 Information recording and reproducing apparatus using light beam modulation on a spiral guide groove disk |
| 04/21/1998 | US5742577 Prism has a plurality of reflective regions each with a predetermined phase difference |
| 04/21/1998 | US5742574 Magneto-optic disk drive controlling apparatus |
| 04/21/1998 | US5742572 Optical information recording/reproducing apparatus which detects focal error |
| 04/21/1998 | US5742566 Optical recording methods and apparatus using light modulation technique based on detecting temperature of the medium |
| 04/21/1998 | US5741541 Substrate; recording layer containing a rare earth-transition metal alloy; dielectric |
| 04/16/1998 | WO1998015951A1 Optical disc, optical disc device, and method for recording an optical disc |
| 04/16/1998 | WO1998015949A1 Recording medium and information recorder/reproducer |
| 04/15/1998 | EP0836177A1 Optical apparatus |
| 04/15/1998 | CN1178979A Optic pickup device and optic disc player |
| 04/14/1998 | US5740435 Data management apparatus and method for managing data of variable lengths recorded on a record medium |
| 04/14/1998 | US5740154 Magnetooptical record medium having adjacent header signals |
| 04/14/1998 | US5740153 Pit strings containing information recorded in spiral or concentric form on substrate surface; high speed, increasing memory capacity |
| 04/14/1998 | US5740148 Stationary optical data storage system using holographic or acousto-optical deflection |
| 04/14/1998 | US5740147 Phase compensation of optical elements by tilting a half wave plate in a magneto-optic disk head |
| 04/14/1998 | US5740143 Disc reproducing apparatus |
| 04/14/1998 | US5740137 Servo control method for an opto-magnetic disc |
| 04/14/1998 | US5740133 Magneto-optical recording medium capable of double mask readout |
| 04/14/1998 | US5739952 Optically isotropic substrate, layer of birefringent material, periodic pattern of ridges and grooves to form grating, grooves filled with optically isotropic material |
| 04/14/1998 | US5738950 Amorphous magnetic alloy film of cobalt, gadolinium, terbium and iron; heat resistance |
| 04/14/1998 | US5738947 Silver-magnesium alloy and magnesium oxide film |
| 04/14/1998 | US5738886 Mold for disk substrate |
| 04/14/1998 | US5738765 Magneto-optic memory device |
| 04/14/1998 | CA2035748C Medium, process for preparing the same, information processing device, information processing method |
| 04/07/1998 | US5737639 Method and apparatus for the recording and reproducing of data on a storage medium |
| 04/07/1998 | US5737301 Laser control for setting average recording power of "1" equal to average recording power of "0" |
| 04/07/1998 | US5737290 Recording medium capable of recording a first data-type and a second data-type, playback method and playback device for playing back from the recording medium, and recording device for recording first-type data and second-type data on the recording medium |
| 04/07/1998 | US5737282 Optical disk apparatus and track access control method utilizing positioned shift between scanning beams |
| 04/07/1998 | US5736265 Magneto-optical recording medium and recording method using the same |
| 04/07/1998 | US5736240 Amorphous rare earth oxides |