DIFF Main Group
G11C 29/00 Checking stores for correct operation ; Testing stores during standby or offline operation
Introduced: September 1968
Title
Titles differ between systems:
IPC: Checking stores for correct operation; Testing stores during standby or offline operation
CPC: Checking stores for correct operation ; Testing stores during standby or offline operation
Full Title
Full titles differ between systems:
IPC:
Checking stores for correct operation; Testing stores during standby or offline operation
CPC:
Checking stores for correct operation ; Testing stores during standby or offline operation
Of 8 combined children, 5 exist in both systems.
3 codes are CPC-only extensions.
IPC defines codes here since 2006.
Child Classifications
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- G11C 29/02 Detection or location of defective auxiliary circuits, e.g. defective refresh counters since 2006 +8 CPC IPC+CPC Available in IPC and CPC
- G11C 29/04 Detection or location of defective memory elements since 2006 +6 CPC IPC+CPC Available in IPC and CPC
- G11C 29/52 Protection of memory contents; Detection of errors in memory contents since 2006 IPC+CPC Available in IPC and CPC
- G11C 29/54 Arrangements for designing test circuits, e.g. design for test [DFT] tools since 2006 IPC+CPC Available in IPC and CPC
- G11C 29/56 External testing equipment for static stores, e.g. automatic test equipment [ATE]; Interfaces therefor since 2006 +7 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