IPC Main Group
B21B 38/00 Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
Introduced: January 1995
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- ROLLING OF METAL
6 direct subcodes
Child Classifications
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- B21B 38/02 for measuring flatness or profile of strips
- B21B 38/04 for measuring thickness, width, diameter or other transverse dimensions of the product
- B21B 38/06 for measuring tension or compression
- B21B 38/08 for measuring roll-force
- B21B 38/1 for measuring roll-gap, e.g. pass indicators
- B21B 38/12 for measuring roll camber
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