US PATENT SUBCLASS 427 / 548
.~.~.~ Magnetic recording medium or device formed

Current as of: June, 1999
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427 /   HD   COATING PROCESSES

457  DF  DIRECT APPLICATION OF ELECTRICAL, MAGNETIC, WAVE, OR PARTICULATE ENERGY {15}
532  DF  .~ Pretreatment of substrate or post-treatment of coated substrate {9}
547  DF  .~.~ Magnetic field or force utilized {2}
548.~.~.~ Magnetic recording medium or device formed {1}
549  DF  .~.~.~.~> Running length substrate

DEFINITION

Classification: 427/548

Magnetic recording medium or device formed:

(under subclass 547) Processes wherein a device or tape is produced to store information by a magnetic means.

(1) Note. For this and indented subclasses it is understood that magnetic recording media usually contain magnetizable particles, hence need not be subsequently crossed to the pertaining subclass of equal or lesser indentation below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

128, for methods of forming magnetic devices in general, not provided for above.

502, for magnetic recording medium formed using high energy ionizing radiation.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, appropriate subclasses, particularly Class 523,

181, for a composition for magnetic purposes, but which is devoid of magnetic material or to processes or preparing said compositions.