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

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)
12/1994
12/28/1994	EP0631280A1 Magnetooptical recording apparatus
12/28/1994	EP0631279A2 Head device for magneto-optical disk
12/28/1994	EP0539412B1 Circuit arrangement for reversing a magnetic field
12/28/1994	CN1027200C Manganese bismuth adding rare-earth element magneto-optical film medium
12/27/1994	US5377172 Modulated magnetic field generation circuit for magneto-optical disks
12/27/1994	US5377167 Recording/reproducing device
12/27/1994	US5377055 Circuit apparatus for driving a magnetic head
12/22/1994	WO1994029867A1 Recording medium management method
12/22/1994	DE4421528A1 Magneto-optical recording medium which can be overwritten by light intensity modulation and a recording and reproducing device suitable for it
12/22/1994	DE4421221A1 Information-recording thin film and information recording medium and also a process for their production
12/22/1994	DE4322149A1 Optical information recording/reproducing device
12/21/1994	EP0630008A1 Multilayer magnetooptic recording media
12/21/1994	EP0630005A1 Optical information recording/reproducing apparatus
12/21/1994	EP0630004A2 Disc reproducing apparatus
12/20/1994	US5375111 Optical information recording medium, and audio and video information recording method
12/20/1994	US5375109 Magneto-optical recording and/or reproducing device
12/20/1994	US5375087 Tunneling-stabilized magnetic reading and recording
12/20/1994	US5374819 Optical head having a beam cutting mirror with a total absorption surface
12/20/1994	US5374472 Ferromagnetic thin films
12/14/1994	EP0628964A2 Recording and/or reproducing apparatus
12/14/1994	EP0628960A1 Optical information recording and/or reproducing apparatus
12/14/1994	EP0628959A2 Apparatus for supporting and connecting a magnetic field modulation head to be used for a photomagnetic recording
12/14/1994	CN1096389A Recording and reproducing appts.
12/13/1994	US5373399 Overload detection and storage of overload markers in an arrangement for recording an analog signal on a record carrier
12/08/1994	WO1994028545A1 Substrate for optical disc and optical disc which uses the substrate
12/08/1994	DE4419477A1 Reinigungsscheiben-Kassette Cleaning disc cartridge
12/07/1994	EP0627736A2 Magnetooptical recording/reproducing apparatus with bias magnetic field generation devices for magnetic modulation recording and optical modulation recording
12/07/1994	EP0627735A1 Optical system for information playback and/or recording
12/07/1994	EP0627733A1 Optical head device and optical information apparatus
12/07/1994	EP0627116A1 Optical memory
12/07/1994	EP0627114A1 Method of reading a recording medium and system using said method
12/07/1994	EP0627113A1 Data recording medium, recorder, reader and recording method
12/06/1994	US5371730 Optical memory and information processing apparatus
12/06/1994	US5371729 Information recording method
12/06/1994	US5371725 Position control system for a read-write head of a magneto-optical disc player having heads which move independently from each other
12/06/1994	US5371722 Method for recording sector control information on magneto-optical disk
12/06/1994	US5371721 Method and apparatus for writing and reading a magneto-optical record carrier
12/06/1994	US5370945 Good vertical magnetic anisotropy 2nd high coercive force
11/1994
11/30/1994	EP0626683A1 Optical recording medium and process for producing the same
11/30/1994	EP0626646A1 File management method for interchangeable storage media
11/30/1994	EP0440810B1 Optical recording medium and information recording apparatus
11/29/1994	US5369629 Magneto-optical recording method and magneto-optical recording medium
11/29/1994	US5369628 Magneto-optic recording medium, magneto-optic recording system and magneto-optic recording method
11/24/1994	DE4417578A1 Reflective film for a magneto-optical recording medium
11/23/1994	EP0328667B1 Magneto-optical storage
11/22/1994	US5367509 Method for reproducing information recorded on a magneto-optical recording medium including servo controlling the dimension of the reproduction region of the recording medium by means of a recorded signal
11/22/1994	US5367508 Magnetic field generation mechanism for magneto-optical recording
11/22/1994	US5367507 Over write capable magnetooptical recording method, and magnetooptical recording apparatus and medium used therefor
11/22/1994	US5367419 Floating magnetic head slider with flexure wings located within slider L-shaped members and upper surface of slider
11/22/1994	US5367403 Optical element and method of fabricating the same
11/17/1994	EP0624871A2 Magnetic head for magneto-optical recording
11/15/1994	US5365535 Semiconductor laser and beam splitting devices, and optical information recording/reproducing, optical communication, and optomagnetic recording/reproducing apparatuses using semiconductor laser and beam splitting devices
11/15/1994	US5365508 Magneto-optical read/write device
11/15/1994	US5365507 Light-amount control device for an optical-disk recording-reproduction apparatus
11/15/1994	US5365505 Information reproducing device
11/15/1994	US5365501 Information recording and reproducing device
11/15/1994	CA1333093C Optical recording element and driving system
11/09/1994	EP0623689A1 Carrier for optical recording substrates
11/08/1994	US5363364 Audio data recording/reproducing apparatus having digital high-speed dubbing function
11/08/1994	US5363363 Apparatus and method for laser noise cancellation in an optical storage system using a front facet monitor signal
11/08/1994	US5363353 Magneto-optical disk drive having multiple electromagnet elements
11/08/1994	US5363352 Magneto-optic disk apparatus
11/08/1994	US5362537 Optical information recording medium comprising two magneto-optical layers which are made of GDFECO and TBFETI, respectively
11/02/1994	EP0622793A2 Apparatus for reproducing optical recording medium and method of reproducing the same
11/02/1994	EP0622792A2 Magnetic head driving apparatus and magnetooptical recording apparatus
11/02/1994	EP0622791A1 Composite magneto-optic memory and media
11/02/1994	EP0622708A2 Photoelectric sensor, information recording system, and information recording and reproducing method
11/01/1994	US5361269 Non-mechanical laser beam scanning device employing a diffraction grating and an acousto-optic deflector for optical recording and readout
11/01/1994	US5361248 Direct overwrite magneto-optical storage medium not requiring an initialization magnet
11/01/1994	US5361246 Optical information processing apparatus provided with means for detecting abnormality of focusing servo with a predetermined sensitivity
11/01/1994	US5361245 Optical signal processing apparatus for detecting the direction of movement of an optical reading device relative to an optical disk
11/01/1994	US5361242 External magnetic field application device including a heat dissipation member and a metal plate for dissipating heat
11/01/1994	CA2014172C Track access control system in rotating disc devices with eccentricity correction
10/1994
10/27/1994	DE4414107A1 Corrosion-resistant silver@-magnesium@ alloy used in sputter coating
10/26/1994	EP0621599A2 Memory control and memory data search
10/26/1994	EP0621598A2 Memory control in recording and/or reproducing apparatus
10/26/1994	EP0621596A2 Memory control device and recording and/or reproducing apparatus
10/26/1994	EP0621592A2 Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same
10/26/1994	EP0621591A2 Optical recording medium and device for reproducing the same
10/26/1994	EP0621529A2 Method and apparatus for recording data on a rewritable optical disk
10/26/1994	CN1094179A Disk apparatus and disk driving device
10/25/1994	US5359623 Magneto-optical disc control system and method for avoiding the need to initialize an entire surface of a storage medium on commencement of use
10/25/1994	US5359589 Optical information recording and reproducing apparatus having functions for adjusting intensity of light beam
10/25/1994	US5359586 Read out apparatus for reading out information from magneto-optic disk
10/25/1994	US5359579 Magneto-optical recording method and medium for recording three-value information
10/25/1994	US5359466 Magnetic head driving circuit with impedance elements to balance auxiliary coil loads
10/25/1994	CA2033275C Bias magnetic field generating apparatus
10/20/1994	DE4413067A1 Magnetooptical disc and disc drive for such a disc
10/19/1994	EP0620550A2 Optical head apparatus
10/19/1994	EP0620549A1 Optical data storage media
10/19/1994	CN1026276C Recording and/or reproducing apparatus for optical disk
10/18/1994	US5357497 Method for detecting defects on magneto-optic recording medium
10/18/1994	US5357494 Magneto-optical playback method
10/18/1994	US5357493 Magneto-optic memory device for overwriting information on magneto-optic recording medium by using a pair of light spots without using an external magnetic field
10/18/1994	US5357381 Flexible magnetic disc drive apparatus for designating alternate sectors for defective sectors
10/13/1994	DE4411855A1 Video disc device and recording and reading method for a video disc which uses the method
10/12/1994	EP0619577A1 Magneto-optical recording medium and method for reproducing information therein
10/12/1994	EP0619576A2 Optical recording medium and process for manufacturing it
10/12/1994	EP0358775B1 Photomagnetic recording method
10/11/1994	US5355354 Non-overwritable magnetooptical recording apparatus using exchange-coupled two-layered medium with interface magnetic wall

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