US PATENT SUBCLASS 346 / 74.3
.~ Physical reorientation of magnetic particles

Current as of: June, 1999
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346 /   HD   RECORDERS

74.2  DF  MAGNETOGRAPHIC {5}
74.3.~ Physical reorientation of magnetic particles

DEFINITION

Classification: 346/74.3

Physical reorientation of magnetic particles:

(under subclass 74.2) Subject matter including physically rearranging particulate magnetic material within a record by application of a magnetic field thereto, thereby altering the reflective nature of the medium to produce the visible image.