US PATENT SUBCLASS 369 / 283
.~ Layered (e.g., permanent protective layer)

Current as of: June, 1999
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369 /   HD   DYNAMIC INFORMATION STORAGE OR RETRIEVAL

272  DF  STORAGE MEDIUM STRUCTURE {11}
283.~ Layered (e.g., permanent protective layer) {2}
284  DF  .~.~> Radiation beam modified or controlling (e.g., photosensitve, optical track) {1}
286  DF  .~.~> Laminated or unified discrete layers

DEFINITION

Classification: 369/283

Layered (e.g., permanent protective layer):

(under subclass 272) Subject matter wherein the storage medium has an adjacent layer.

(1) Note. This layer may be a base, or substrate, or a loose cover layer. The loose cover layer will have a permanent relation to the storage medium. The cover layer which is completely removable, such as a paper sleeve for a disk record, is classifiable in subclass 291.