198314 ⎘
Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups - or by different subgroups of group ; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording and a beam of light for reproducing, e.g. light-induced thermomagnetic recording, Kerr effect reproducing characterised by the transducing operation to be executed; Recording by modulating only the magnetic field at the transducer
Optical recording medium and disc cartridge
#2Control means and method of controlling a current through a coil
#3Optical information processing apparatus
#4Enhanced data storage and retrieval devices and systems and methods for utilizing same
#5Thin-film coil, coil driving circuit and magnetic head
#6Stray field equalization for improved domain expansion reading
#7Optical disk apparatus and method for recording data by utilizing an overwrite technique or a two-path write technique
#8Magneto-optical recording/reproducing apparatus and magneto-optical recording/reproducing method
#9Near-field hybrid magnetic-optical head system