CPC Main Group
B43L 11/00 Non-circular-curve-drawing instruments (curve rulers or templets B43L13/20)
4 direct subcodes
Child Classifications
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- B43L 11/02 for drawing conic sections
- B43L 11/06 for drawing spirals
- B43L 11/08 for drawing involutes
Top Applicants
Top 10 applicants by patent filingsfor class B43, 2013–2023, worldwide · Source: EPO PATSTAT
- SOCIETE BIC FR 422
- MITSUBISHI PENCIL COMPANY JP 381
- PILOT CORPORATION JP 299
- MITSUBISHI PENCIL COMPANY 213
- PILOT CORPORATION 100
- WACOM COMPANY JP 89
- STAEDTLER MARS & COMPANY DE 87
- KOTOBUKI JP 82
- CRAYOLA US 78
- SANFORD US 73