Bending not restricted to forms of material mentioned in only one of groups , ,; Bending not provided for in groups; Twisting

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: PERFORMING OPERATIONS; TRANSPORTING
Class:: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Subclass:: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL

Filing statistics

IPC B21D 11/00 belongs to the parent subclass B21D, which recorded 351,007 patent applications worldwide between 2013 and 2023. Annual filings grew from 16,565 in 2013 to 42,835 in 2023 (+159%), peaking at 47,343 applications in 2020. The most active applicants in class B21 are JFE STEEL (2,318 applications), JFE STEEL (2,294 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (2,083 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Corrugating or bending into wave form , Flanging

8 direct subcodes

Child Classifications

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B21D 11/02 Bending by stretching or pulling over a die
B21D 11/06 Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
B21D 11/08 Bending by altering the thickness of part of the cross-section of the work
B21D 11/1 Bending specially adapted to produce specific articles, e.g. leaf springs
B21D 11/14 Twisting
B21D 11/18 Joggling
B21D 11/2 Bending sheet metal, not otherwise provided for
B21D 11/22 Auxiliary equipment, e.g. positioning devices

Top Applicants

Top 10 applicants by patent filingsfor 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