Recording, reproducing or erasing systems characterised by the shape of the carrier

Full Title

Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation , reproducing using an optical beam at lower power ; Record carriers therefor (G11B11/00, G11B13/00 take precedence) > Recording, reproducing or erasing systems characterised by the shape of the carrier

Child Classifications

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• G11B 7/0025 with cylinders or cylinder-like carriers , e.g. truncated cones
• G11B 7/003 with webs , e.g. belts, spooled tapes or films of quasi-infinite extent
• G11B 7/0033 with cards
• G11B 7/0037 with discs