IPC Subgroup
G11C 17/1 in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM
Introduced: January 1990
Last revised: January 2006
Full Title
Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards > using semiconductor devices, e.g. bipolar elements > in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM
Classification Context
- Section:
- PHYSICS
- Class:
- INFORMATION STORAGE
- Subclass:
- STATIC STORES
1 direct subcode
Child Classifications
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- G11C 17/12 using field-effect devices
Top Applicants
Top 10 applicants by patent filingsfor 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