Patents
Sitemap › G11 - Information storage › G11B - Information storage based on relative movement between record carrier and transducer › 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)
12/1989
12/27/1989EP0347858A2 Optical disc and recording and reproducing apparatus employing the optical disc
12/27/1989EP0347480A1 Electrophotographical optical memory system
12/27/1989CA1264085A1 Optical disc record reproducing apparatus
12/26/1989US4890273 Optical information recording/reproducing system with variable gain servo error correction in response to detected track formats
12/26/1989US4890178 Magnetic bias coil for a magneto-optical recording apparatus
12/26/1989US4889757 Optical recording disk
12/26/1989US4889756 Sheet-like, multilayer, laser-optical recording material
12/20/1989EP0346907A2 Tracking and focus actuator for a holographic optical head
12/19/1989US4888758 Data storage using amorphous metallic storage medium
12/19/1989US4888750 Method and system for erase before write magneto-optic recording
12/14/1989WO1989012302A1 Bistable optical storage for erasable optical disks
12/13/1989EP0346063A2 Magneto-optical information recording method and apparatus
12/13/1989EP0345877A1 Magneto-optical recorder with a modulated magnetic field
12/13/1989EP0345696A2 Data reproducing system
12/12/1989US4886718 Device for reversible optical data storage
12/12/1989CA1263893A1 Optical memory with sampled tracking for a preformatted medium
12/06/1989EP0345232A2 Integrated optical device for magneto-optical recording and reading head
11/1989
11/30/1989DE3908150A1 Optisches oder magnetooptisches datensystem Optical or magneto-optical data system
11/29/1989EP0343727A1 Method of optically scanning an information plane and optical record carriers and scanning apparatuses suitable for use of said method
11/28/1989US4884259 Optical memory disk and track access therefor
11/28/1989US4883710 Magneto-optical recording medium
11/23/1989EP0342968A2 Method for recording and reproducing information, apparatus therefor and recording medium
11/23/1989EP0342967A2 Electrostatic information recording medium and electrostatic information recording and reproducing method
11/23/1989EP0342624A2 Magneto-optical data recording system
11/21/1989US4882718 Single-head, direct overwrite magneto-optic system and method
11/21/1989US4882231 Magneto-optical recording medium
11/15/1989EP0341936A2 Tilt adjustment mechanism for object lens driving
11/15/1989EP0341829A2 Optical head with flying lens
11/15/1989EP0341785A1 Optical disc having an antiresonance ring
11/15/1989EP0341778A2 Magneto-optical recording method and magneto-optical recording apparatus
11/15/1989EP0341521A1 Magneto-optical storage medium
11/14/1989US4881216 Optical head in an optical memory device
11/14/1989US4881133 Arrangement for the recording of an information signal
11/14/1989US4880694 Magnetic alloy film of rare-earth metals, heat resistance and corrosion resistance
11/08/1989EP0189187B1 Magnetic-optical disc memory system
11/07/1989US4879703 Magneto-optic memory apparatus with defect detection of recording medium during erasing operation
11/07/1989US4879632 Cooling system for an electronic circuit device
11/02/1989EP0339875A2 Method and apparatus for initializing intermediate region between tracks on magnetooptical recording medium
11/02/1989EP0339722A1 Arrangement for optically scanning a magneto-optical carrier
11/02/1989EP0339608A2 An alloy material for data storage of magneto-optical disk and its manufacture process
11/02/1989EP0339368A2 Information-recording element
11/02/1989DE3907877A1 Magneto-optical recording material
10/1989
10/31/1989US4878213 System for recording and readout of information at atomic scale densities and method therefor
10/31/1989US4878132 Thermomagnetic recording method applying power modulated laser on a magnetically coupled multi-layer structure of perpendicular anisotropy magnetic film
10/31/1989US4877690 Rare earth-transition metal recording layer, ceramic barrier layer, self-passivating active metal layer
10/31/1989US4877666 Magneto-optic substrates
10/26/1989DE3912378A1 Magneto-optical recording material
10/25/1989EP0338864A2 Magneto-optical playback heads
10/25/1989EP0338827A2 Magneto-optical recording and reproducing device
10/25/1989EP0338083A1 Scanning tunneling microscope with means for correcting surface data
10/24/1989US4876667 Antimony, selenium, tellurium solid solution
10/24/1989US4876159 Evaporating rare earth metal and transition metal and sequenti ally depositing on substrate at maximum repeat distance of 21a to form non-homogenous, non-layered mixed film
10/24/1989US4876144 Single crystal thin film
10/24/1989US4876133 Optical data recording system and method of production of recording medium
10/19/1989WO1989009991A1 Data storage system
10/19/1989DE3811375A1 Datenspeichersystem A data storage system
10/18/1989EP0337553A1 Laminated product, compound used in the laminated product and optical information carrier provided with the laminated product
10/12/1989DE3810438A1 Cylinder store for magnetic-optical or optical data storage and reproduction
10/11/1989EP0336706A2 Disk drive apparatus
10/11/1989EP0336687A2 Recording and reproducing optical disk device
10/11/1989EP0336423A2 Magneto-optical disk device
10/11/1989EP0336237A2 Data storage system and process for its manufacture
10/10/1989US4873678 Optical head and optical information processor using the same
10/04/1989EP0335302A2 Apparatus for the reversible storage of data
10/03/1989US4872078 Method and apparatus for encoding and direct overwriting of magneto-optic data
10/03/1989US4871614 Opto-magnetic recording medium having three exchange-coupled magnetic layers
09/1989
09/27/1989CN1035905A Image display
09/26/1989US4870631 Optical turntable system with reflected spot position detection
09/21/1989WO1989008914A1 Apparatus for writing data on a magneto-optic recording medium
09/21/1989WO1989008913A1 Opto-magnetic disc
09/21/1989WO1989008912A1 Magneto-optical storage medium
09/20/1989EP0333467A1 Optical magnetic recording medium provided with high coercive force layer and low coercive force layer containing light rare earth
09/20/1989EP0333462A2 Magneto-optical recording system having medium with domainless control layer
09/19/1989US4868804 Optical memory system which uses a different illumination mode when scanning reserved areas
09/19/1989US4868803 Magneto-optic pickup head including tracking and focusing error correction
09/19/1989US4868802 Magnetooptic recording and erasing head which performs biasing, tracking and focusing
09/19/1989US4868010 Annealing, heat resistance
09/13/1989EP0332408A1 Magneto-optical recording device
09/13/1989EP0331737A1 Photomagnetic recording medium
09/13/1989CN1035576A Optically readable record carrier of the inscribable type, apparatus for manufacturing such a record carrier, and apparatuses for recording and/or reading information on/from such a record carrier
09/13/1989CN1035575A Method of and apparatus for recording information signal
09/12/1989US4866694 Read/write head for optical disks
09/12/1989US4866692 Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type
09/12/1989US4866546 Recording and reproducing apparatus for disk-type recording media
09/06/1989EP0331476A1 Magneto-optical information reproducing apparatus having a polarizing beam splitter disposed with an inclination of 45
09/05/1989US4864537 Polymers and dye combinations and methods for their use in optical recording
09/05/1989US4864125 Extra magnetic field positioning apparatus
08/1989
08/30/1989EP0330507A2 Magneto-optic recording and regenerating process, device using same and magneto-optic disk
08/30/1989EP0330476A2 Optical information processing apparatus for stopping tracking and/or focusing controls in an area having preformat signal recorded therein
08/30/1989EP0330394A2 Two-layered type opto-magnetic recording medium having low-coercive force layer containing Gd and at least one of Tb and Dy
08/29/1989US4862439 Recording device that identifies recordable areas of a disk record
08/29/1989US4862437 Magneto-optical recording reproducing, and erasing apparatus having two independent magnetic field applying devices
08/29/1989US4862414 Small diameter roll
08/29/1989US4861671 Outer impermeable oxide layer, inner non-oxide layer with graded composition
08/29/1989US4861656 Optical recording medium
08/24/1989WO1989007823A1 Photomagnetic recording method
08/23/1989EP0329425A2 Optical recording medium and manufacturing method thereof
08/23/1989EP0328667A1 Magneto-optical storage
08/23/1989EP0147436B1 Apparatus for reading magnetically recorded information
08/23/1989CN1035007A Magnetooptical recording medium
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