IPC Main Group
A41H 23/00 Devices for applying chalk; Sharpening or holding chalk
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- HUMAN NECESSITIES
- Class:
- WEARING APPAREL
- Subclass:
- APPLIANCES OR METHODS FOR MAKING CLOTHES, e.g. FOR DRESS-MAKING OR FOR TAILORING, NOT OTHERWISE PROVIDED FOR
Related Keywords
applying, sharpening or holding tailor's CHALKtailor's CHALKSHARPENING of tailors' chalks
Top Applicants
Top 10 applicants by patent filingsfor class A41, 2013–2023, worldwide · Source: EPO PATSTAT
- NIKE US 840
- NIKE INNOVATE US 719
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 444
- SGCC(STATE GRID CORPORATION OF CHINA) 351
- HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY 287
- TORAY INDUSTRIES JP 257
- JIANGXI INSTITUTE OF FASHION TECHNOLOGY 248
- ZHEJIANG SCI TECH UNIVERSITY 235
- GUANGDONG COSMO-LADY INDUSTRIAL COMPANY 219
- GUNZE 218