G11B 5/00 Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (G11B11/00 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
CPC: Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (G11B11/00 take precedence)
Full Title
Full titles differ between systems:
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (G11B11/00 take precedence)
Of 16 combined children, 15 exist in both systems.
1 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.
5 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G11B 5/004 Recording on, or reproducing or erasing from, magnetic drums (G11B19/00 takes precedence) since 1974 IPC+CPC Available in IPC and CPC
- G11B 5/008 Recording on, or reproducing or erasing from, magnetic tapes, or wires (G11B15/00 take precedence; ) since 1974 +2 CPC IPC+CPC Available in IPC and CPC
- G11B 5/012 Recording on, or reproducing or erasing from, magnetic disks (G11B17/00, G11B19/00 take precedence) since 1974 IPC+CPC Available in IPC and CPC
- G11B 5/02 Recording, reproducing, or erasing methods; Read, write or erase circuits therefor +1 CPC IPC+CPC Available in IPC and CPC
- G11B 5/10 Structure or manufacture of housings or shields for heads +1 CPC IPC+CPC Available in IPC and CPC
- G11B 5/127 Structure or manufacture of heads, e.g. inductive since 1985 +3 CPC IPC+CPC Available in IPC and CPC
- G11B 5/40 Protective measures on heads, e.g. against excessive temperature (G11B5/31 takes precedence; protection against wear G11B5/255 ) IPC+CPC Available in IPC and CPC
- G11B 5/455 Arrangements for functional testing of heads; Measuring arrangements for heads since 1985 +1 CPC IPC+CPC Available in IPC and CPC
- G11B 5/48 Disposition or mounting of heads relative to record carriers +2 CPC IPC+CPC Available in IPC and CPC
- G11B 5/62 Record carriers characterised by the selection of the material IPC+CPC Available in IPC and CPC
- G11B 5/74 Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum +1 CPC IPC+CPC Available in IPC and CPC
- G11B 5/84 Processes or apparatus specially adapted for manufacturing record carriers +4 CPC IPC+CPC Available in IPC and CPC
- G11B 5/86 Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class G11,2013–2023, worldwide · Source: EPO PATSTAT
- MICRON TECHNOLOGY US 10,574
- SK HYNIX KR 9,138
- SAMSUNG ELECTRONICS COMPANY KR 9,004
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 3,739
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 3,443
- INTEL CORPORATION US 2,952
- SANDISK TECHNOLOGIES US 2,905
- WESTERN DIGITAL TECHNOLOGIES US 2,630
- TOSHIBA CORPORATION JP 2,593
- SEAGATE TECHNOLOGY US 2,472
Top Applicants (CPC)
Class G11,2013–2023, worldwide · Source: EPO PATSTAT
- MICRON TECHNOLOGY US 12,397
- SAMSUNG ELECTRONICS COMPANY KR 12,238
- SK HYNIX KR 11,371
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 4,601
- INTEL CORPORATION US 3,874
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 3,866
- SANDISK TECHNOLOGIES US 3,151
- SK HYNIX 3,143
- SAMSUNG ELECTRONICS COMPANY 3,073
- WESTERN DIGITAL TECHNOLOGIES US 2,961