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Class Information
Number: 369/13.41
Name: Dynamic information storage or retrieval > Storage or retrieval by simultaneous application of diverse types of electromagnetic radiation > Magnetic field and light beam > Specific detail of recording medium > Specific detail of layer (e.g., bias or initializing layers, etc.) > Plural magnetic layers (e.g., recording and reproducing layers)
Description: Subject matter including more than one segment of defined thickness wherein each one has a magnetic aspect.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7423939 |
Method for manufacturing magneto-optical recording medium |
Sep. 9, 2008 |
| 7164623 |
Magneto-optical recording medium |
Jan. 16, 2007 |
| 7038873 |
Magnetic recording medium having a specific relation of coercive force HC and residual magnetization MR in perpendicular direction to substrate surface |
May. 2, 2006 |
| 6996052 |
Optical information recording medium and optical recording method |
Feb. 7, 2006 |
| 6914254 |
Apparatus for manufacturing evaluation reference tape |
Jul. 5, 2005 |
| 6844083 |
Magneto-optical recording medium possessing a magnetic assist layer |
Jan. 18, 2005 |
| 6770387 |
Magneto-optical recording medium and method of reproducing the same |
Aug. 3, 2004 |
| 6767656 |
Magneto-optical recording medium and method of reproducing the same |
Jul. 27, 2004 |
| 6665235 |
Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium |
Dec. 16, 2003 |
| 6649285 |
Magneto-optical recording medium and manufacturing method therefor |
Nov. 18, 2003 |
| 6633514 |
Magneto-optical reproducing method using a plural of different reproducing beams |
Oct. 14, 2003 |
| 6477120 |
Magneto-optical recording medium |
Nov. 5, 2002 |
| 6377414 |
Magnetic media patterning utilizing heat-induced phase transition |
Apr. 23, 2002 |
| 6261707 |
Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium |
Jul. 17, 2001 |
| 6187460 |
Magneto-optical recording medium and method for reproducing information therein |
Feb. 13, 2001 |
| 5968678 |
Magneto-optical recording medium and manufacturing method thereof |
Oct. 19, 1999 |
| 5815469 |
Magneto-optical recording device having recording magnetic field in the same direction as reproducing magnetic field |
Sep. 29, 1998 |
| 5764601 |
Method of manufacturing a magneto-optical recording medium having a readout layer with varying composition and curie temperature |
Jun. 9, 1998 |
| 5710746 |
Magneto-optical recording medium and reading method with magnetic layers of different coercivity |
Jan. 20, 1998 |
| 5656384 |
Magnetooptical recording medium, method for producing the same, method for recording or reproducing information in or from the same |
Aug. 12, 1997 |
| 5592445 |
Exchange coupling optical recording medium and recording/reproducing device therefor |
Jan. 7, 1997 |
| 5547773 |
Magnetooptic recording medium |
Aug. 20, 1996 |
| 5539709 |
Magnetooptical recording method and apparatus using multi-layered media |
Jul. 23, 1996 |
| 5450382 |
Magneto-optical recording medium having a layer that retains its state of magnetization regardless of the presence of an external magnetic field, and a recording/reproducing method therefor |
Sep. 12, 1995 |
| 5384758 |
Reproduction-only magneto-optical disk with selectively exchange coupled layers, and reproduction method and reproduction apparatus therefor |
Jan. 24, 1995 |
| 5367507 |
Over write capable magnetooptical recording method, and magnetooptical recording apparatus and medium used therefor |
Nov. 22, 1994 |
| 5329505 |
System and method for overwriteable magneto-optical recording |
Jul. 12, 1994 |
| 5265074 |
Magneto-optical recording medium |
Nov. 23, 1993 |
| 5233578 |
Method of recording information on a recording medium having at least two magnetic layers |
Aug. 3, 1993 |
| 5210724 |
Optomagnetic recording method and apparatus which precludes an interface magnetic wall within block magnetic wall |
May. 11, 1993 |
| 5184335 |
Method and system for erasing previously recorded domains in a magneto-optic recording medium |
Feb. 2, 1993 |
| 4932012 |
Method for regenerating information from a magneto-optical information recording medium |
Jun. 5, 1990 |
| 4858212 |
Recording method on magnetooptical disc with laser magnetic field |
Aug. 15, 1989 |
| 4855975 |
Over write capable magnetooptical recording method using two beams, and magnetooptical recording apparatus therefor |
Aug. 8, 1989 |
| 4706232 |
Optical recording and reproducing apparatus |
Nov. 10, 1987 |
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