Medium for recording

Details Medium for recording Medium for recording

1981-04-22

1983-07-26

Pianalto, Bernard D.

Stock material or miscellaneous articles

Circular sheet or circular blank

Ornamental, decorative, pattern, or indicia

427 48, 427128, 427284, 427287, 428 64, 428 65, 428172, 428694, 428900, B32B 302

Patent

active

043954472

ABSTRACT:
A video disc includes a magnetic material applied thereon in such a manner that the orientation of said magnetic material is gradually intensified from the outermost track of the video disc to the innermost track thereof, starting from zero orientation at the outermost track.

REFERENCES:
patent: 4001463 (1977-01-01), Schaefer et al.
patent: 4271782 (1981-06-01), Bate et al.

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