US PATENT SUBCLASS 428 / 694 EC
.~.~.~.~.~.~.~ Exchange coupling

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

411.1  DF  COMPOSITE (NONSTRUCTURAL LAMINATE) {25}
688  DF  .~ Of inorganic material {1}
689  DF  .~.~ Metal-compound-containing layer {7}
692  DF  .~.~.~ Defined magnetic layer {2}
694 R  DF  .~.~.~.~ Dynamic recording medium {5}
694 ML  DF  .~.~.~.~.~ Magneto optical recording layer {7}
694 MM  DF  .~.~.~.~.~.~ Multiple magnetic layers {2}
694 EC.~.~.~.~.~.~.~ Exchange coupling

Unofficial Alpha Subclasses: R ML SC LE GT DE MT RE NF XS RL AH MM EC IS GR PR MP TS TB TP TC TZ TF TR TM BC BG BU BY BL BP BF BS BB BR BN BA BH BM ST SL SG

DEFINITION

Classification: 428/694

Dynamic recording medium:

(under subclass 692) Subject matter which has a use as a recording medium, e.g., tape, disc, etc., which is "read" by using relative motion between the medium and the reading device and wherein the composition of a backing or support material is not defined in the claims.

SEE OR SEARCH CLASS

360, Dynamic Magnetic Information Storage or Retrieval,

134, for a recording tape having material recorded thereon.