CPC Subgroup Additional Only
G11B 2220/21 characterised in that the disc is of read-only, rewritable, or recordable type
Full Title
Record carriers by type > Disc-shaped record carriers > characterised in that the disc is of read-only, rewritable, or recordable type
3 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- G11B 2220/211 Discs having both read-only and rewritable or recordable areas containing application data; Partial ROM media
- G11B 2220/213 Read-only discs
- G11B 2220/215 Recordable discs
Top Applicants
Top 10 applicants by patent filingsfor 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