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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 29/003 CPC only CPC only
  • G11C 29/006 CPC only CPC only
  • 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

Top Applicants

Top Applicants (IPC)

Class G11,2013–2023, worldwide · Source: EPO PATSTAT

  1. MICRON TECHNOLOGY US 10,574
  2. SK HYNIX KR 9,138
  3. SAMSUNG ELECTRONICS COMPANY KR 9,004
  4. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 3,739
  5. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 3,443
  6. INTEL CORPORATION US 2,952
  7. SANDISK TECHNOLOGIES US 2,905
  8. WESTERN DIGITAL TECHNOLOGIES US 2,630
  9. TOSHIBA CORPORATION JP 2,593
  10. SEAGATE TECHNOLOGY US 2,472

Top Applicants (CPC)

Class G11,2013–2023, worldwide · Source: EPO PATSTAT

  1. MICRON TECHNOLOGY US 12,397
  2. SAMSUNG ELECTRONICS COMPANY KR 12,238
  3. SK HYNIX KR 11,371
  4. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 4,601
  5. INTEL CORPORATION US 3,874
  6. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 3,866
  7. SANDISK TECHNOLOGIES US 3,151
  8. SK HYNIX 3,143
  9. SAMSUNG ELECTRONICS COMPANY 3,073
  10. WESTERN DIGITAL TECHNOLOGIES US 2,961