IPC Main Group
G11C 17/00 Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- INFORMATION STORAGE
- Subclass:
- STATIC STORES
Related Keywords
use of HOLOGRAPHY for digital data storagePROMREAD-ONLY stores [= static digital stores]static STORES of PROM type
5 direct subcodes
Child Classifications
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- G11C 17/02 using magnetic or inductive elements
- G11C 17/04 using capacitive elements
- G11C 17/06 using diode elements
- G11C 17/08 using semiconductor devices, e.g. bipolar elements
- G11C 17/14 in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM
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