US PATENT SUBCLASS 369 / 275.4
.~.~ Pit/bubble/groove structure specifies

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

272  DF  STORAGE MEDIUM STRUCTURE {11}
275.1  DF  .~ Optical track structure (e.g., phase or diffracting structure, etc.) {4}
275.4.~.~ Pit/bubble/groove structure specifies

DEFINITION

Classification: 369/275.4

Pit/bubble/groove structure specifics:

(under subclass 275.1) Subject matter wherein data is stored in the form of pits (indentations), bubbles (protuberances) or modulation of a groove and specifics of the pit/bubble/groove are set forth such as its wall angles, dimensions, or phase depth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

109, for systems using a diffraction storage medium such as those with pits or a grating.