US PATENT SUBCLASS 369 / 277
.~ Special groove (e.g., particular groove shape)

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

272  DF  STORAGE MEDIUM STRUCTURE {11}
277.~ Special groove (e.g., particular groove shape) {2}
278  DF  .~.~> Groove acts as control system signal
279  DF  .~.~> Guide during storage or retrieval

DEFINITION

Classification: 369/277

Special groove (e.g., particular groove shape):

(under subclass 272) Subject matter wherein the storage medium has a groove of specified form.