using discharge tubes

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor > using electric elements > using discharge tubes

CPC:

Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor (G11C14/00 - G11C21/00 take precedence) > using electric elements > using discharge tubes

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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G11C 11/265 CPC only CPC only
G11C 11/28 using gas-filled tubes IPC+CPC Available in IPC and CPC
G11C 11/30 using vacuum tubes (G11C11/23 takes precedence) 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