Jacobson, Price, Holman & Stern
Magnetic recording medium
 A magnetic recording medium comprising an undercoat layer formed on one side or both sides of a non-magnetic substrate and a magnetic layer formed on the undercoat layer, characterized in that the undercoat layer contains powders having an average particle size of 0.5 to 5.0 .mu.m and an aspect ratio of 5.0 or more and a magnetic recording medium comprising a magnetic layer formed on a non-magnetic substrate, characterized in that the non-magnetic substrate contains powders having an average particle size of 0.5 to 5.0 .mu.m and an aspect ratio of 5.0 or more. 
Victor Company Of Japan, Ltd.
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Y10S G11B G11B Y10T Y10T Y10T
additional inventional inventional additional additional additional
Osamu Isao Kenichi Kazuhiro Masamichi Shigeru
Kobayashi Sasaki Kikuchi Takeda Saito Nakano