DIFF Subgroup
B21D 53/50 metal slide-fastener parts
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Making other particular articles > haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples > metal slide-fastener parts
CPC:
Making other particular articles (making wire fabrics B21F; making chains or chain parts B21L) > haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples > metal slide-fastener parts
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
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- B21D 53/52 fastener elements; Attaching such elements so far as this procedure is combined with the process for making the elements 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