CPC Subgroup
B43K 7/03 pressurised, e.g. by gas
Full Title
Ball-point pens (; multiple-point writing implements B43K27/00) > Ink reservoirs; Ink cartridges (B43K7/01 takes precedence) > pressurised, e.g. by gas
1 direct subcode
Child Classifications
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- B43K 7/035 the gas acting on a piston
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