CPC Subgroup
G11B 7/004 Recording, reproducing or erasing methods; Read, write or erase circuits therefor
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 methods; Read, write or erase circuits therefor
5 direct subcodes
Child Classifications
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- G11B 7/0045 Recording (G11B7/006, G11B7/0065 take precedence)
- G11B 7/005 Reproducing (G11B7/0065 takes precedence)
- G11B 7/0055 Erasing (G11B7/006, G11B7/0065 take precedence)
- G11B 7/006 Overwriting (G11B7/0065 takes precedence)
- G11B 7/0065 Recording, reproducing or erasing by using optical interference patterns, e.g. holograms