US PATENT SUBCLASS 250 / 201.5
.~.~.~.~ With optical storage medium; e.g., optical disc, etc.

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
201.1  DF  .~ Photocell controls its own optical systems {8}
201.2  DF  .~.~ Automatic focus control {5}
201.4  DF  .~.~.~ Active autofocus {1}
201.5.~.~.~.~ With optical storage medium; e.g., optical disc, etc.

DEFINITION

Classification: 250/201.5

With optical storage medium; e.g., optical disc, etc.:

(under subclass 201.4) Subject matter in which the image is

formed on the surface of an optical information storage or retrieval medium, e.g., an optical disc.

SEE OR SEARCH CLASS

369, Dynamic Information Storage or Retrieval,

45, for patents claiming details of the optical storage medium or writing or reading of information to or from the medium, and subclasses 100+ for optical details of the optical information storage and retrieval system.