CPC Subgroup
B43K 7/08 Preventing leakage
Full Title
Ball-point pens (; multiple-point writing implements B43K27/00) > Ink reservoirs; Ink cartridges (B43K7/01 takes precedence) > Preventing leakage
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