Burns, Doane, Swecker & Mathis
Magnetic recording medium
 A magnetic recording medium includes a substrate, a magnetic layer and a subbing layer therebetween. The subbing layer includes tin oxide type powders having a mean particle size not higher than 0.8 micron. S/N ratio is improved. 
Fuji Photo Film Co., Ltd.
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Takahito Toshimitu Masaaki
Miyoshi Okutu Fujiyama