CPC Main Group
B21F 45/00 Wire-working in the manufacture of other particular articles (of pins, needles, nails, hairpins B21G; of chains B21L)
Filing statistics
CPC B21F 45/00 belongs to the parent subclass B21F, which recorded 20,343 patent applications worldwide between 2013 and 2023. Annual filings grew from 703 in 2013 to 2,160 in 2023 (+207%), peaking at 3,062 applications in 2020. The most active applicants in class B21 are JFE STEEL (2,667 applications), NIPPON STEEL CORPORATION (2,049 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (1,967 applications).
Source: EPO PATSTAT, worldwide filings
12 direct subcodes
Child Classifications
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- B21F 45/02 of clothes hangers
- B21F 45/04 of elements, e.g. levers or links, for bottle stoppers
- B21F 45/06 of flexible shafts or hollow conduits, e.g. for Bowden mechanisms
- B21F 45/08 of loom heddles
- B21F 45/10 of cards for fabric-napping machines
- B21F 45/12 of fishing hooks
- B21F 45/14 of end-pieces for laces or ropes
- B21F 45/16 of devices for fastening or securing purposes
Top Applicants
Top 10 applicants by patent filingsfor 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