for performing particular operations

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Methods for forging, hammering, or pressing; Special equipment or accessories therefor > for performing particular operations

CPC:

Methods for forging, hammering, or pressing (for working sheet-metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor > for performing particular operations

Of 5 combined children, 3 exist in both systems.

2 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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B21J 5/063 +1 CPC CPC only CPC only
B21J 5/068 CPC only CPC only
B21J 5/08 Upsetting IPC+CPC Available in IPC and CPC
B21J 5/10 Piercing billets (in combination with extrusion B21C23/00) IPC+CPC Available in IPC and CPC
B21J 5/12 Forming profiles on internal or external surfaces (making screw-thread by forging, pressing, or hammering B21K) IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B21,2013–2023, worldwide · Source: EPO PATSTAT

JFE STEEL 2,318
JFE STEEL JP 2,294
POSCO (POHANG IRON AND STEEL COMPANY) KR 2,083
NIPPON STEEL CORPORATION JP 1,650
NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,631
SMS GROUP DE 1,472
BAOSHAN IRON & STEEL COMPANY 1,181
SGCC(STATE GRID CORPORATION OF CHINA) 1,079
ANHUI JIANGHUAI AUTOMOBILE 984
HYUNDAI STEEL COMPANY KR 980

Top Applicants (CPC)

Class B21,2013–2023, worldwide · Source: EPO PATSTAT

JFE STEEL JP 2,667
NIPPON STEEL CORPORATION JP 2,049
POSCO (POHANG IRON AND STEEL COMPANY) KR 1,967
NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,800
SMS GROUP DE 1,538
JFE STEEL 1,150
ARCELORMITTAL LU 1,142
BAOSHAN IRON & STEEL COMPANY 821
HYUNDAI STEEL COMPANY KR 808
THYSSENKRUPP STEEL EUROPE DE 660