Unwinding or uncoiling

Introduced: September 1968

Last revised: January 2006

Full Title

Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only > Unwinding or uncoiling

Classification Context

Section:: PERFORMING OPERATIONS; TRANSPORTING
Class:: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Subclass:: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL

Related Keywords

UNCOILING wire, metal strip or other metallic material in connection with metal workingUNWINDING of wire, metal strip or other metallic material in connection with metal working

2 direct subcodes

Child Classifications

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B21C 47/18 from reels or drums
B21C 47/22 Unwinding coils without reels or drums

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