IPC Subgroup
G11B 5/004 Recording on, or reproducing or erasing from, magnetic drums
Introduced: July 1974
Last revised: January 2006
Full Title
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor > Recording on, or reproducing or erasing from, magnetic drums
Classification Context
- Section:
- PHYSICS
- Class:
- INFORMATION STORAGE
- Subclass:
- INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER