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Home › Floppy disk comprising a cellulosic resin with a polar group in a side chain and perromagnetic particles of a specific surface area

Floppy disk comprising a cellulosic resin with a polar group in a side chain and perromagnetic particles of a specific surface area

US Patent 5091238 · Granted Feb 25, 1992

Estimated economic value: $30,000 ⓘ

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