| 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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| 07/21/1998 | US5783301 Alternating layers of platinum/cobalt or palladium/cobalt on a seed duplex layer of amorphous indium tin oxide and polycrystalline metal; increased sensitivity, coercivity, squareness and kerr rotation; lower reflection; sensitivity |
| 07/21/1998 | US5783300 Second magnetic layer having higher curie point and lower coercive force than first magnetic layer |
| 07/15/1998 | EP0853318A2 Memory control in recording and/or reproducing apparatus |
| 07/15/1998 | EP0853314A1 Diffraction-based direct read during write using magneto-optic recording media |
| 07/15/1998 | EP0853313A2 Optical disc system |
| 07/15/1998 | EP0853312A2 Optical disk, optical disk unit and optical disk producing method |
| 07/14/1998 | US5781676 Waveguide integrated optical pickup device and optical waveguide element |
| 07/14/1998 | US5781524 High density optical head assembly |
| 07/14/1998 | US5781521 Optical disk recording/reproducing apparatus |
| 07/14/1998 | US5781518 Disc recording method wherein a segment is recorded with reference data to control the phase of a data clock |
| 07/14/1998 | US5781513 Magnetic-field modulation recording method and device for preventing residual information from remaining after overwriting |
| 07/14/1998 | US5781360 Method and apparatus for detecting data track misregistration |
| 07/09/1998 | WO1998029774A1 Device for deflecting light beams |
| 07/09/1998 | DE19754421A1 Magneto optical memory material |
| 07/09/1998 | CA2276141A1 Device for deflecting light beams |
| 07/08/1998 | EP0852379A2 Method of changing rotational rate of storage medium from initial rate to desired rate |
| 07/08/1998 | CN1039059C Polarizing beam splitter and magneto optic reading device using the same |
| 07/07/1998 | US5777977 Recording and reproducing apparatus |
| 07/07/1998 | US5777975 Optical pickup incorporating an integrated optical guide member |
| 07/07/1998 | US5777974 Optical head and magneto-optical reproducing apparatus using the same |
| 07/07/1998 | US5777965 Optical disk having an erased-state indicator and optical disk apparatus for reducing frequency of disk-erasing operations |
| 07/07/1998 | US5777964 Optical disk apparatus |
| 07/07/1998 | US5777962 Calibrating an optical detector to minimize noise from undesired perturbations in disk surfaces |
| 07/07/1998 | US5777959 Optical disk apparatus having a plurality of objective lenses |
| 07/07/1998 | US5777953 Arrangement of magneto-optical recording medium which capable of reproducing an individual bit |
| 07/07/1998 | US5777952 Thin bias magnet unit for magneto-optical recording device |
| 07/02/1998 | WO1998028742A2 Optical recording method and apparatus using this method |
| 07/02/1998 | DE19654845A1 Vorrichtung zur Ablenkung von Lichtstrahlen Apparatus for deflection of light rays |
| 07/01/1998 | EP0851416A2 Optical disk and method of manufacturing an optical disk |
| 07/01/1998 | EP0851413A2 Information recording apparatus |
| 07/01/1998 | CN1186297A Information recording apparatus |
| 07/01/1998 | CN1038963C Method and device for optically scanning information plane and optical rocord carriers |
| 06/30/1998 | US5774444 Split photo detector for detecting a central portion and a peripheral portion of a reflected light beam |
| 06/30/1998 | US5774443 Optical head device capable of reducing the light power loss |
| 06/30/1998 | US5774440 Optical data storage and retrieval system and method |
| 06/30/1998 | US5774439 Optical-disk recording and reproducing apparatus and optical disk for recording information on lands and grooves |
| 06/30/1998 | US5774430 Optical modulation overwritable magnetooptical recording medium |
| 06/30/1998 | US5774429 Magneto-optical recording medium, and information recording/reproduction method using the medium |
| 06/30/1998 | US5774428 Method and apparatus for magneto-optical recording or reproducing using modulated magnetic field |
| 06/30/1998 | US5772856 Magneto-optical recording medium and method of manufacturing the same |
| 06/25/1998 | WO1998027553A1 Optical disk, method for recording and reproducing write-once information on and from optical disk, optical disk reproducing device, optical disk recording and reproducing device, device for recording write-once information on optical disk, and optical disk recording device |
| 06/25/1998 | WO1998027550A1 Recorder |
| 06/23/1998 | US5771394 Apparatus having signal processors for providing respective signals to master processor to notify that newly written data can be obtained from one or more memories |
| 06/23/1998 | US5771393 Servo loop control apparatus having master processor to control the apparatus and second processor dedicated to specific preprogrammed servo loop control tasks |
| 06/23/1998 | US5771220 Output control apparatus of semiconductor laser device |
| 06/23/1998 | US5771217 Magneto-optical disk apparatus having a ejector arm and magnetic field generating means mounted on a stationary base |
| 06/23/1998 | US5771216 Photomagnetic recording device and photomagnetic reproducing device |
| 06/23/1998 | US5771211 Magneto-optical recording media having a reading layer with a specified range of temperature coefficients of a kerr rotation angle |
| 06/23/1998 | US5771142 Multitrack magnetic write/read head arrangement with integal multiple head gap widths |
| 06/17/1998 | EP0848381A2 Magneto-optical recording medium exclusively for reproduction, method of manufacturing the same and method of reproducing the medium |
| 06/17/1998 | EP0847577A1 Multitrack tape device using a movable magnetic head with a planar surface and comprising tape supporting means |
| 06/17/1998 | CN1185217A Video media security and tracking system |
| 06/16/1998 | US5768613 Computing apparatus configured for partitioned processing |
| 06/16/1998 | US5768298 Information recording method, reproducing method and reproducing apparatus |
| 06/16/1998 | US5768251 Optical recording/reproducing apparatus for high density multilayered disks |
| 06/16/1998 | US5768246 Method and apparatus for recording and reproducing digital data using frequency domain conversion and detection |
| 06/16/1998 | US5768245 Optical disk apparatus |
| 06/16/1998 | US5768241 Shutter operating mechanism for magneto-optical disk drive |
| 06/16/1998 | US5768237 Disc cartridge loading device with lid lock detection switch |
| 06/16/1998 | US5768236 Recording and reproducing apparatus and method using a buffer memory to ensure continuous output during track jumps caused by either vibration or fast reproduction mode |
| 06/16/1998 | US5768226 Information recording and/or reproducing method and apparatus in which seek of a recording and/or reproducing head is corrected on the basis of detected moving velocity |
| 06/16/1998 | US5768221 Method of and apparatus for initializing multi-layer optical recording medium |
| 06/16/1998 | US5768220 Motorless bias-field device and method having magnetic coupling between a magnetic and the recording element for inverting the magnetic field |
| 06/16/1998 | US5768219 Optical information recording/reproducing apparatus that produces verifying reproduction signals by executing a computation using detection signals of multi-divided detection surfaces of a photo-detector |
| 06/16/1998 | US5768218 Magneto-optical recording medium having a plurality of magnetic layers |
| 06/16/1998 | US5768075 Disk medium w/magnetically filled features aligned in rows and columns |
| 06/16/1998 | US5767507 Polarization sensitive photodetectors and detector arrays |
| 06/11/1998 | WO1998025267A1 Method and apparatus for writing optical recording media |
| 06/11/1998 | WO1998025266A1 Optical recording medium |
| 06/10/1998 | EP0847052A1 Magneto-optical recording medium |
| 06/10/1998 | EP0846055A1 Optical storage medium |
| 06/10/1998 | CN1184269A Magneto-optical recording medium |
| 06/09/1998 | US5764619 Optical recording medium having two separate recording layers |
| 06/09/1998 | US5764608 Information recording-reproducing apparatus |
| 06/09/1998 | US5764606 Tracking control apparatus for a multi-layer optical disc and method therefor |
| 06/09/1998 | US5764601 Method of manufacturing a magneto-optical recording medium having a readout layer with varying composition and curie temperature |
| 06/09/1998 | US5764600 Overwritable, high-density magneto-optical recording medium and recording/reproduction method therefor |
| 06/03/1998 | EP0364176B1 System and method for formatting high density storage media |
| 06/03/1998 | CN1183611A Information recording medium and information recording and reproducing apparatus using the same |
| 06/02/1998 | US5761301 Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk |
| 06/02/1998 | US5761183 Optical pickup |
| 06/02/1998 | US5761173 Recording and/or reproducing apparatus and method for data reproduction and processing |
| 06/02/1998 | US5761172 Method of optical reproduction using pulsed light |
| 06/02/1998 | US5761171 Generating data detecting threshold levels from reference patterns recorded in an optical disk, such as a magneto-optical disk |
| 06/02/1998 | US5761170 Optical data storage and retrieval system and method |
| 06/02/1998 | US5761169 Methods and apparatus for recording to and reproducing from an optical master disc data to emulate the behavior of a reproducing only optical disc |
| 06/02/1998 | US5761166 Method and system for simultaneous storage and/or retrieval (storval) of a plurality of data on a disk means |
| 06/02/1998 | US5759657 Optical recording medium and device for reproducing the same |
| 05/27/1998 | EP0844612A2 Apparatus for reproducing information from an optical disc |
| 05/27/1998 | EP0844611A2 Optical disk |
| 05/27/1998 | EP0844609A1 Optical disk device |
| 05/27/1998 | EP0844607A2 Information recording medium and information recording and reproducing apparatus using the same |
| 05/27/1998 | EP0844604A2 Magneto-optical read head |
| 05/26/1998 | US5757978 Method and system for detecting localized birefringence defects in a dynamic global birefringence field |
| 05/26/1998 | US5757751 Baseline correction circuit for pulse width modulated data readback systems |
| 05/26/1998 | US5757749 Information processing system operable with a detachable recording medium |
| 05/26/1998 | US5757737 Recording/reproducing data units in successive sectors by N heads using N memory devices |
| 05/26/1998 | US5757736 Method of and apparatus for recording information to magneto optical disc having plural recording layers |
| 05/26/1998 | US5757735 Magento-optical recording method using a multi-pulse pattern generation circuit |
| 05/26/1998 | US5757734 Magneto-optical recording medium and method for reproducing from same |