| 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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| 08/12/1997 | US5657308 Apparatus for recording/reproducing information data in two dimensional format |
| 08/12/1997 | US5657306 Optical pick-up head having polarizing beam splitter |
| 08/12/1997 | US5657305 Optical information recording and reproducing apparatus including a total reflection surface or a light shield plate disposed between a polarized light separating surface and a detection device for light beam compensation |
| 08/12/1997 | US5657304 Optical recording medium with a diffraction grating layer |
| 08/12/1997 | US5657300 Magnetic head having elastic members for magneto-optical recording device |
| 08/12/1997 | US5657299 Magneto-optical recording medium |
| 08/12/1997 | US5656385 Magnetic recording medium and information recording-reproduction method using the same |
| 08/12/1997 | US5656384 Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same |
| 08/12/1997 | US5656370 Optical recording medium |
| 08/07/1997 | DE19652382A1 Mini disc cassette drive for road vehicles |
| 08/07/1997 | DE19603749A1 Data storage technique uses nuclear or electron spin properties |
| 08/06/1997 | EP0788149A1 Method of depositing nanometre scale particles |
| 08/06/1997 | EP0788099A1 System and method of reproducing signals recorded on a magnetooptic recording medium |
| 08/06/1997 | EP0788098A1 Magneto-optical disk focus and tracking servo device |
| 08/06/1997 | CN1156164A Ultraviolet curing coating composition, optical magnetic disc using said coating and its producing method |
| 08/05/1997 | US5654952 Device for compressing digital signals |
| 08/05/1997 | US5654950 Method for protecting data recorded on a partial read-only memory (ROM) medium from unauthorized copying |
| 08/05/1997 | US5654947 Method for recording information on a record carrier having a track which is transversely modulated in accordance with an auxiliary signal including address codes and auxiliary codes, and a method for producing the track |
| 08/05/1997 | US5654945 Position searching system based on detecting linear velocity of an optical disc |
| 08/05/1997 | US5654943 Magnetic head driving circuit operable with recording data transferred at high transfer rate and magneto-optical recording apparatus employing the magnetic head driving circuit |
| 08/05/1997 | US5654131 High density recording |
| 08/05/1997 | US5654058 Magneto-optical disk |
| 07/30/1997 | EP0786772A2 Disc reproducing apparatus and disc recording apparatus |
| 07/30/1997 | EP0786767A2 Optical recording medium and optical recording/reproducing device, and manufacturing method of optical recording medium |
| 07/30/1997 | EP0542730B1 Optical disc and disc drive apparatus for writing/reading data into/from the disc |
| 07/29/1997 | US5652817 Optical power splitter with electically-controlled switching structures |
| 07/29/1997 | US5652745 Optical system using polarized light with prevention of effect of birefringence |
| 07/29/1997 | US5652739 Apparatus for applying a magnetic field to a magneto-optical disk device |
| 07/29/1997 | US5652738 Magnetooptical recording method for overwriting information on a recording medium includes selecting one of two recording modes based on recording information |
| 07/29/1997 | US5652737 Magneto-optical disk pick-up device having mode splitter using cut off effect caused by tapered waveguide |
| 07/29/1997 | CA1339152C Electrostatic information recording medium and electrostatic informationrecording and reproducing method |
| 07/29/1997 | CA1339151C Method for recording and reproducing information, apparatus therefor andrecording medium |
| 07/24/1997 | WO1997026652A1 Magnetooptical recording medium |
| 07/24/1997 | DE19700378A1 Magneto-optical recording medium |
| 07/23/1997 | EP0785548A2 A baseline correction circuit for PWM data readback systems |
| 07/23/1997 | EP0785545A2 Magneto-optical recording medium and method of reproducing from such medium |
| 07/23/1997 | CN1155221A Data decoding instrument and method thereof |
| 07/23/1997 | CN1155141A Medium recording device, medium reproducing device, recording and reproducing method and medium thereof |
| 07/22/1997 | US5650991 Magneto-optical disc having preformatted information to prevent unauthorized data duplication |
| 07/22/1997 | US5650987 Optical data recording/reproducing apparatus and optical data storage medium for use in the same |
| 07/22/1997 | US5650984 Method for causing a light beam to jump from an initial track to a target track |
| 07/22/1997 | US5650983 Printed circuit board magnetic head for magneto-optical recording device |
| 07/17/1997 | DE19637922A1 Optical disc recording and reproducing equipment |
| 07/16/1997 | EP0784317A2 Magneto-optic disk apparatus |
| 07/16/1997 | EP0783749A1 Magneto-optic recording medium having magneto-optic film layers separated by yttrium oxide |
| 07/16/1997 | CN1154550A Optical disk apparatus |
| 07/16/1997 | CN1154549A Optical disk apparatus |
| 07/16/1997 | CN1154548A Optical disk apparatus and medium carrier and medium turntable for optical disk apparatus |
| 07/16/1997 | CN1154537A Optical disk apparatus |
| 07/16/1997 | CN1154536A Optical disk apparatus |
| 07/16/1997 | CN1154535A Optical disk apparatus |
| 07/15/1997 | US5648950 Hologram integrated with a beam splitter to separate a plurality of polarized reflected light beams |
| 07/15/1997 | US5648949 Method and apparatus for information reproduction at variable reference level |
| 07/15/1997 | US5648945 Optical information recording/reproducing apparatus |
| 07/15/1997 | US5648944 Recording/reproducing apparatus that utilizes the servo clock signals to form read and write clock signals with different frequencies |
| 07/15/1997 | US5648943 Disk recording/reproduction device of reduced thickness with driving mechanism for moving heads parallel to the disk face |
| 07/15/1997 | US5648163 Multilayer stack of recording material and dielectric |
| 07/15/1997 | US5648162 Multilayer; alloy containing rare earth metal |
| 07/15/1997 | US5648161 Having protective and reflective layers and magnetic layers of alloys of heavy rare earth, light rare earth and transition metals |
| 07/15/1997 | US5648134 Thermal recording medium capable of keeping width of mark train constant and recording method for the same |
| 07/09/1997 | EP0782745A1 Method and apparatus for storing data using spin-polarized electrons |
| 07/09/1997 | CN1153971A Output control apparatus of semiconductor laser device |
| 07/09/1997 | CN1153970A Method of and apparatus for initializing optical recording medium |
| 07/08/1997 | US5647031 Device for checking the position and/or the focusing of a focused light beam |
| 07/08/1997 | US5646930 Recording method and disk including initialization of recording tracks to amorphous phase with a constant power laser power beam |
| 07/08/1997 | US5645978 Projecting light spots onto a photosensitive material in specified manner |
| 07/08/1997 | US5645911 Over-writable method of magnetooptical recording |
| 07/08/1997 | CA2087288C Magneto-optical recording medium and manufacturing method thereof |
| 07/08/1997 | CA2062041C Information processing apparatus having a floating-type head with a bevelled slider |
| 07/08/1997 | CA2054880C Information recording and reproducing device |
| 07/03/1997 | WO1997023874A1 Reproducing circuit |
| 07/02/1997 | EP0782135A2 Magneto-optical recording medium and method for reproducing therefrom |
| 07/02/1997 | EP0782134A1 Optical recording method for stabilized overwriting using laser beam intensity settings |
| 07/02/1997 | EP0782133A1 Reproducing apparatus |
| 07/02/1997 | EP0426864B1 Magnetooptical medium |
| 07/02/1997 | CN1153376A Optical disk system, record power and clear power set method |
| 07/01/1997 | US5644566 Magneto-optical recording medium |
| 07/01/1997 | US5644563 Optical pickup system |
| 07/01/1997 | US5644556 Magneto-optical disk having cellularly divided regions with alternating directions of magnetization and method of initializing direction of magnetization of magneto-optical disk prior to recording of information |
| 07/01/1997 | US5644555 Multiple data surface magneto-optical data storage system |
| 07/01/1997 | US5644554 Magnetic head load/unload device, method and a magneto-optical disk apparatus using the same |
| 07/01/1997 | US5644457 Multiple gap read/write head for data storage devices |
| 07/01/1997 | US5644420 Light beam condensing apparatus and method of driving optical recording medium by applying the apparatus |
| 07/01/1997 | US5643687 Magneto-optic memory medium and a method for producing the same |
| 07/01/1997 | US5643650 Having as reflecting layer alloy of aluminum and yttrium, neodymium or gadolinium; improved sensitivity |
| 06/26/1997 | WO1997022969A1 Magneto-optic recording medium and reproduction method thereof |
| 06/26/1997 | DE19652446A1 Magneto-optical recording medium |
| 06/25/1997 | EP0780841A2 Magnetooptical recording medium using a magnetic phase transformation material and a recording method using the medium |
| 06/25/1997 | CN1152772A Magnetic-optical sensor with optical store |
| 06/24/1997 | US5642343 Magnetooptic disc apparatus and recording medium |
| 06/24/1997 | US5642342 Apparatus for controlling the rotational speed of an optical-disc |
| 06/24/1997 | US5642336 Magnetic writing head for magneto-optical recording with thick protective coating |
| 06/24/1997 | CA2041680C Magneto-optical disk and method of manufacturing the same |
| 06/18/1997 | EP0779622A2 Optical disk apparatus |
| 06/18/1997 | EP0779621A2 Optical disk apparatus |
| 06/18/1997 | EP0779618A1 Optical disk apparatus |
| 06/18/1997 | EP0779617A1 Optical disk apparatus |
| 06/18/1997 | EP0779616A1 Optical disk apparatus and medium carrier and medium turntable for optical disk apparatus |
| 06/18/1997 | EP0779613A2 Optical disk apparatus |
| 06/17/1997 | US5640535 Library apparatus for duplicating disks and then sorting them to easily distinguish defective disks from normally copied disks |