US PATENT SUBCLASS 428 / 64.2
.~ 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.~ Recording medium or carrier {5}
64.3  DF  .~.~> Magneto optical recording medium or carrier
64.4  DF  .~.~> Optical recording medium or carrier {5}
65.3  DF  .~.~> Magnetic recording medium or carrier {4}
65.8  DF  .~.~> Lubricant containing
65.9  DF  .~.~> Fibrous material containing

DEFINITION

Classification: 428/64.2

Recording medium or carrier:

(under subclass 64.1) Subject matter wherein the circular sheet or circular blank is a tangible object upon which an information signal is to be stored, the object having a characteristic which is, or may be, modified at positional increments in accordance with the time variation of information which is to be stored thereon.

(1) Note. The recording medium or carrier for purposes of these subclasses need not be the specific layer that is intended to contain the information signal. All layers of the medium or carrier are considered to be the recording medium or carrier.

SEE OR SEARCH THIS CLASS, SUBCLASS:

900, for a collection of magnetizable stock material.

SEE OR SEARCH CLASS

360, Dynamic Magnetic Information Storage or Retrieval,

135, for a disc having information recorded thereon in magnetic form. 369, Dynamic Information Storage or Retrieval,

272+, for a disc having information recorded thereon in the form of grooves.