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)
01/1989
01/04/1989EP0297634A2 Alternate storage areas in magnetooptical media
01/03/1989US4796250 Optical recording and reproducing apparatus including a disc extraction area for power setting a laser
01/03/1989US4796241 Device for producing a high frequency modulation magnetic field used in magneto-optical recording
01/03/1989US4796226 Reading head in integrated optics for reading information recorded on a magnetic support
01/03/1989CA1248229A1 Optical memory element
12/1988
12/28/1988EP0296888A2 Magnetooptical recording media
12/28/1988EP0296844A1 Overwriting method and system for magneto-optical recording
12/28/1988EP0296716A2 Data storage device having a phase change memory medium reversible by direct overwrite and method of direct overwrite
12/27/1988US4794585 Optical head having a hologram lens and polarizers for use with magneto-optic medium
12/27/1988US4794560 Eraseable self biasing thermal magneto-optic medium
12/21/1988EP0295979A1 Method for writing information on a magnetic recording medium
12/21/1988EP0295572A2 Magneto-optical disk reading apparatus and method
12/20/1988US4792474 Aluminum silicon nitride dielectric film
12/20/1988US4792227 Apparatus for measuring the refractive index of a substrate for an optical recording medium and method of measuring the same
12/20/1988CA1247237A1 Optical memory device
12/14/1988EP0294490A1 Optical disc discriminating device
12/14/1988EP0294489A1 Optical disc and optical disc unit
12/08/1988DE3817708A1 Magneto-optical information storage medium and manufacture thereof
12/07/1988EP0294242A2 Record face identifying device for optical magnetic record medium
12/07/1988EP0294241A2 Optical record/reproduction apparatus
12/07/1988EP0293797A2 Magneto-optical recording disk
12/06/1988US4789972 Selectively controlling the erasure in a magneto-optic recording medium
12/06/1988US4789606 Magneto-optical recording medium
11/1988
11/30/1988EP0292917A1 Apparatus for information recording and/or reproducing on or from an optical disc
11/30/1988EP0292733A2 Magneto-optical disk reproduction apparatus
11/29/1988US4788678 Optical information recording media substrate
11/29/1988US4788674 Optical disc record reproducing apparatus
11/29/1988US4788672 Method and apparatus for controlling renewal of data in optical disc memory
11/29/1988US4788671 Information recording and reproducing apparatus for effecting simultaneous recording and reproduction but at different rates
11/29/1988US4788426 Electronic read/write system
11/29/1988US4788095 Metal oxide magnetic substance and a magnetic film consisting thereof and their uses
11/29/1988CA1245763A1 Phase changeable material
11/23/1988EP0292309A2 Equipment for magneto-optic reading and writing
11/23/1988EP0292160A2 Head for reading a magneto-optical data carrier
11/23/1988EP0291847A2 Planar magneto-optical recording medium having several layers
11/23/1988CN88103214A Thermo-magnetic recording method
11/22/1988US4786922 Electron beam recording and reproducing apparatus
11/22/1988US4786585 Image forming and data storage
11/22/1988US4786559 Magnetooptical storage element
11/17/1988EP0291248A2 A magneto-optic medium and system
11/17/1988EP0291057A2 Method and means for reading electronic signal patterns stored on a movable image recording surface
11/17/1988EP0290648A1 Atomic force sensor head for investigating the topography of a surface
11/17/1988EP0290522A1 Device for generating and detecting magnetic material structures at atomic levels.
11/17/1988DE3714804A1 Optical information storage disc
11/17/1988DE3714803A1 Optical device for recording and reproducing an item of information stored on a storage dis
11/15/1988US4785444 Optical recording disc
11/15/1988US4785438 Magneto-optical disc reproducing apparatus with improved two-part head
11/15/1988US4785167 Photodetector having cascaded photoelements
11/09/1988EP0290281A2 Apparatus for giving auxiliary magnetic field
11/09/1988EP0289642A1 Erasable electro-optic storage disk
11/08/1988US4783721 Cooling system for an electronic circuit device
11/08/1988US4783590 Error signal producing device having improved linearity
11/02/1988EP0289316A2 Alloy target for manufacturing a magneto-optical recording medium
11/02/1988EP0289315A2 Alloy target for manufacturing a magneto-optical recording medium
11/02/1988EP0289304A2 Beam control device for a laser used in an optical memory system
11/02/1988EP0289031A2 Magneto-optical recording medium
11/02/1988EP0289004A2 Recording and reproducing apparatus
11/02/1988CN88102870A System for recording information signal, and record carrier and recording device for use in the system
11/01/1988US4782477 Transparent substrate allows radiation beam to pass through
10/1988
10/27/1988DE3811684A1 Process for producing a magneto-optical recording medium
10/27/1988DE3717566A1 Method of reading from a memory information taking the form of magnetic domains
10/26/1988EP0288114A1 System for recording information signal, and record carrier and recording device for use in the system
10/26/1988EP0288069A2 Thermomagnetic recording method applying a power modulated laser beam on a magnetically coupled multi-layer structure of a perpendicular anisotropy magnetic film
10/26/1988EP0288033A2 Pickup apparatus for magneto-optical recording medium
10/26/1988EP0288010A2 Rare earth metal-iron group metal target, alloy powder therefor and method of producing same
10/25/1988US4780383 Optical storage system having expanded capacity
10/25/1988US4780377 Magneto-optical recording medium
10/20/1988WO1988008192A1 Photomagnetic recording membrane
10/20/1988WO1988008191A1 Laser reproduction apparatus
10/19/1988EP0286938A2 Irreversible optical recording media and method of manufacture
10/18/1988US4779250 Magneto-optical signal read-out system using divided photodetector
10/18/1988US4778747 Method of manufacturing optical memory element
10/12/1988EP0286126A2 Information recording method and apparatus using reversible phase change
10/12/1988EP0286070A2 A magnetic bias coil of a magneto-optical recording apparatus
10/11/1988US4777553 Magnetic head
10/11/1988US4777492 Thermal recording method
10/11/1988US4777082 Optical magnetic recording medium
10/11/1988US4777068 Optical recording medium
10/06/1988WO1988007742A1 Optical recording/reproducing apparatus
10/05/1988EP0285461A2 Magneto-optic recording and reproduction apparatus
10/05/1988EP0285241A2 Magneto-optic information-carrying medium
10/05/1988EP0285126A2 A head for a magnetooptic recording medium
10/04/1988US4775603 Rare earth-transition metal alloy recording layer, zinc sulfide-calcium fluoride antipeeling base layer
09/1988
09/28/1988EP0284112A2 Magneto-optical memory and process for its preparation
09/28/1988EP0284056A2 Method of optically recording information and apparatus therefor
09/27/1988US4774698 Optical disc recording and reproducing apparatus with improved servo control
09/27/1988US4774615 Magneto-optic read-out method and apparatus with polarization correction means
09/27/1988US4774522 Method of recording a binary signal on an optically readable record carrier and apparatus for carrying out the method
09/21/1988EP0283017A1 Information retrieval system with tracking error compensation
09/21/1988EP0282744A2 Magneto-optical disk
09/21/1988EP0282527A1 Method for making an amorphous aluminum-nitrogen alloy layer.
09/20/1988US4773060 Optical information recording device
09/20/1988US4773053 Optical system for guiding the read beam in a magneto-optical storage
09/15/1988DE3804733A1 Magneto-optical disc memory system
09/14/1988EP0282356A2 Magneto-optical recording medium and method
09/13/1988US4771415 Optical data storage and readout apparatus and head, using optical fibers between stationary and movable units
09/13/1988US4771414 Optical pick-up apparatus
09/13/1988US4771347 Magneto-optical recording system
09/06/1988US4769802 Information recording medium disc and method and apparatus for recording/reproducing information using the disc
09/06/1988US4769800 Positioning device for a sensing head of an optical data storage system
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