G11B 7/004 Recording, reproducing or erasing methods; Read, write or erase circuits therefor
Introduced: January 2000
Full Title
Full titles differ between systems:
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 > Recording, reproducing or erasing methods; Read, write or erase circuits therefor
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
IPC and CPC are identically structured here. All 5 subcodes exist in both systems.
4 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 2000.
Child Classifications
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- G11B 7/0045 Recording (G11B7/006, G11B7/0065 take precedence) since 2000 +8 CPC IPC+CPC Available in IPC and CPC
- G11B 7/005 Reproducing (G11B7/0065 takes precedence) since 2000 +3 CPC IPC+CPC Available in IPC and CPC
- G11B 7/0055 Erasing (G11B7/006, G11B7/0065 take precedence) since 2000 +3 CPC IPC+CPC Available in IPC and CPC
- G11B 7/006 Overwriting (G11B7/0065 takes precedence) since 2000 +1 CPC IPC+CPC Available in IPC and CPC
- G11B 7/0065 Recording, reproducing or erasing by using optical interference patterns, e.g. holograms since 2000 +2 CPC IPC+CPC Available in IPC and CPC