B21D 31/00 Other methods for working sheet metal, metal tubes, metal profiles
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 31/00 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
Working of sheet metal, metal tubes, rods or profiles without essentially removing material - Shaping by press-cutting; Perforating
Related Keywords
3 direct subcodes
Child Classifications
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- B21D 31/02 Stabbing or piercing, e.g. for making sieves
- B21D 31/04 Expanding other than provided for in groups , e.g. for making expanded metal
- B21D 31/06 Deforming sheet metal, tubes or profiles by sequential impacts, e.g. hammering, beating, peen forming
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