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)
12/1991
12/03/1991US5069984 Larger curie temperature differential between magnetic layers
11/1991
11/27/1991EP0256110A4 Apparatus and method for increasing storage capacity of recording media
11/26/1991US5068841 Magneto-optical recording/reproducing device
11/26/1991US5068050 High stable magnetic thin film and cores
11/26/1991US5068022 Process for sputtering multilayers for magneto-optical recording
11/26/1991CA1292570C Optoelectronic signal recording medium and method of making same
11/21/1991DE4114234A1 Optical recording and storage disc system - uses information from designated data control tracks to determine type of light recording medium and data format used
11/19/1991US5067120 Disk drive apparatus
11/13/1991EP0456452A2 Magneto-optical disk and method of manufacturing the same
11/12/1991US5065390 Optical playback head
11/12/1991US5065378 System for reproducing a signal recorded in a magnetic recording medium by using a magnetostatic wave
11/12/1991US5065377 Method of and apparatus for writing and reading a magneto-optical record carrier with an information density greater than that corresponding to the size of the scanning spot
11/06/1991EP0455158A2 Recording and reproducing apparatus for using magneto-optical disc
11/06/1991EP0454869A1 Electrostatic information recording medium and electrostatic information recording/reproducing method
11/06/1991EP0454858A1 Magnetooptical recording medium
11/06/1991EP0454854A1 Optical pickup apparatus comprising a focus adjusting apparatus
11/05/1991US5063555 Rotary optical head
11/05/1991US5063554 Magneto-optic disk unit having means for preventing erroneous insertion of disk cartridge
11/05/1991US5063538 Optoelectronic signal recording medium and method of making same
11/05/1991US5062885 Rare earth metal-iron group metal target, alloy powder therefor and method of producing same
10/1991
10/31/1991WO1991016470A1 Amorphous uranium alloy and use thereof
10/30/1991EP0454079A2 Magnetooptical recording media
10/30/1991EP0453995A2 Optical disc recording apparatus
10/30/1991EP0453576A1 Optical pickup apparatus and optical reproducing apparatus
10/30/1991CN1055831A Platinum or palladium/corbalt multilayer on zine oxide or indium oxidelayer for mahneto-optical recording
10/29/1991US5062091 Magneto-optical recording method and apparatus capable of overwriting data using a radiation beam
10/25/1991CA2041032A1 Magnetooptical recording media
10/23/1991EP0452884A2 A rewritable optical disc
10/23/1991EP0452851A1 Information recording/reproducing apparatus
10/23/1991CN1014474B Thermo-magnetic recording method
10/22/1991US5060214 Optical pickup device keeping coincident the optical axes of the objective lens and of the recording/reproducing beam
10/22/1991US5060210 Controlling head seeking speed in disk storage units by limiting displacement of head with respect to its supporting headarm
10/22/1991US5060208 Magnetooptical recording method and apparatus utilizing shift adjustment
10/22/1991US5060207 Magneto-optical recording/reproducing apparatus
10/22/1991US5060104 Rotary head device with six head units
10/22/1991US5059473 Transparent protective plates
10/18/1991WO1991016708A1 Production method of magnetooptical recording medium and magnetooptical recording medium
10/18/1991CA2058923A1 Magnetooptical recording medium and process for the preparation thereof
10/16/1991EP0452155A2 Over-write capable magnetooptical recording medium having plastic substrate
10/16/1991EP0452063A2 Optical integrated device for magneto-optical reproducing head
10/16/1991EP0451297A1 Pretreatment of overwritable opto-magnetic recording medium and pretreated overwritable opto-magnetic recording medium
10/15/1991US5058099 Magneto-optical memory element
10/15/1991US5058094 Disc loading apparatus
10/09/1991EP0450895A2 Apparatus for recording and reproducing information
10/09/1991EP0450655A1 Apparatus for recording information on and/or reproducing information from optical disc
10/09/1991EP0450629A1 Recording and reproducing device and recording medium therefor
10/09/1991EP0450622A2 Data reproduction circuit
10/09/1991EP0450237A2 Overwrite capable magneto-optic recording medium with small exchange coupling force
10/08/1991US5055364 Magnetooptical recording element
10/08/1991US5055353 Magneto-optical recording medium
10/03/1991WO1991015013A1 Magnetooptic recording medium, and method of magnetooptic recording and reproduction
10/02/1991EP0449252A1 Magneto-optical recording media
10/02/1991EP0449183A2 Magneto-optical recording medium
10/02/1991EP0448919A2 Recording media
10/01/1991US5053995 Tunnel current data storage apparatus having separate lever bodies
10/01/1991US5053611 Device for reducing mechanical vibrations when utilizing a magneto-optical card as a recording medium
10/01/1991US5053288 Heat, humidity stabilization
10/01/1991US5053287 Oxidation resistance; formed without heating substrate
09/1991
09/30/1991CA2039251A1 Magneto-optical recording media
09/25/1991EP0447948A1 Thin, transparent corrosion resistant coatings and process for their fabrication
09/25/1991EP0447815A2 Magnetooptic device
09/25/1991EP0447713A2 Position detector
09/25/1991EP0447617A2 Optical magnetic recording and reproducing system
09/25/1991CN1054864A 磁动机 Magnetic motive
09/24/1991US5051977 Scanning tunneling microscope memory utilizing optical fluorescence of substrate for reading
09/24/1991US5051970 Magneto-optic recording system with overwrite capability
09/24/1991US5051950 Read/write optical memory
09/19/1991WO1991014263A1 Platinum or palladium/cobalt multilayer on a zinc oxide or indium oxide layer for magneto-optical recording
09/19/1991WO1991014206A1 Electrostatic information recording medium
09/18/1991EP0447265A2 Optical information recording/reproducing apparatus
09/18/1991EP0446967A2 An optical memory element
09/18/1991EP0446892A2 Optical data medium recording methods
09/18/1991EP0446784A2 Magnetooptical data disk
09/18/1991CN1054684A Circuit for reversing magnetic field
09/17/1991US5050145 Optical disk recording and reproducing apparatus having faster reproducing speed than recording speed
09/17/1991US5050144 Recording intensity modulated signals and polarization-modulated optical signals in the same area of a storage member
09/17/1991US5050143 Device for optical reading and magnetic writing on a data carrier
09/17/1991US5050015 Method and arrangement for reducing wear in a magnetic storage means
09/17/1991US5049462 Reading out information stored in thin polymer layers
09/17/1991CA1289217C Photodetector having cascaded photoelements
09/12/1991DE4008022A1 Non-volatile electronic memory system - uses electron beam to warm magnetic cell above Curie temperature when value is changed
09/12/1991DE4007589A1 Magneto=optical material used in storage media - based on multicomponent system contg. copper-chromium chalcogenide
09/11/1991EP0446021A2 Reproducing optical device for a magneto-optical recording medium
09/11/1991EP0445957A2 Magneto-optical disk and method of reproducing the same
09/11/1991CN1054450A Improved process for sputtering multilayers for magneto-optical recording
09/05/1991WO1991013440A1 Membrane memory system
09/04/1991EP0444833A2 Magnetic recording apparatus and magnetic recording method
09/04/1991EP0444766A2 Optical pickup, optical information recording carrier and recording and reproducing apparatus thereof
09/04/1991EP0444145A1 Circuit arrangement for identifying the type of an optical record carrier.
09/03/1991US5045373 Laminated product, compound used in the laminated product and optical information carrier provided with the laminated product
09/03/1991CA1288512C Optical memory device
08/1991
08/28/1991EP0443878A2 Magneto-optical recording medium
08/28/1991EP0443442A2 Magneto-optical recording medium
08/27/1991US5043974 Hermetically sealed
08/27/1991US5043960 Overwritable magneto-optic recording and reproducing apparatus
08/27/1991US5043959 Apparatus for developing a magnetic field which maintains a neutral position when the magnetic biasing field is not applied
08/21/1991EP0442536A2 Atomic force sensor head for measuring the properties of a data store
08/21/1991EP0442494A2 Magneto-optical recording medium
08/21/1991EP0441967A1 Optical recording medium, data recording method and data reproducing method
08/20/1991US5042022 Optical disk recording/reproducing apparatus with synchronized data writing
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