US PATENT SUBCLASS 428 / 64.4
.~.~ Optical recording medium or carrier

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

64.1  DF  CIRCULAR SHEET OR CIRCULAR BLANK {8}
64.2  DF  .~ Recording medium or carrier {5}
64.4.~.~ Optical recording medium or carrier {5}
64.5  DF  .~.~.~> Tellurium containing {1}
64.7  DF  .~.~.~> Polycarbonate containing
64.8  DF  .~.~.~> Coloring agent containing {1}
65.1  DF  .~.~.~> Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof (e.g., acrylamide, acrylate ester, etc.)
65.2  DF  .~.~.~> Adhesive containing

DEFINITION

Classification: 428/64.4

Optical recording medium or carrier:

(under subclass 64.2) Subject matter wherein the recording medium or carrier is designed to undergo a chemical or physical change; e.g., irradiating the medium with a laser beam to alter the optical characteristics of the medium or carrier in the irradiated area, etc.