DIFF Main Group
B43L 23/00 Sharpeners for pencils or leads (grinding or cutting tools in general B24; B26; combined with writing implements B43K29/06)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Sharpeners for pencils or leads
CPC: Sharpeners for pencils or leads (grinding or cutting tools in general B24; B26; combined with writing implements B43K29/06)
Full Title
Full titles differ between systems:
IPC:
Sharpeners for pencils or leads
CPC:
Sharpeners for pencils or leads (grinding or cutting tools in general B24; B26; combined with writing implements B43K29/06)
CPC subdivides this area 2x more granularly than IPC with 4 additional codes.
4 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B43L 23/06 in which the pencils or leads are sharpened by only axial movement against cutting blades IPC+CPC Available in IPC and CPC
- B43L 23/08 in which the pencils or leads are sharpened mainly by rotational movement against cutting blades (B43L23/02 takes precedence) +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B43,2013–2023, worldwide · Source: EPO PATSTAT
- PILOT CORPORATION 1,100
- MITSUBISHI PENCIL COMPANY 818
- SOCIETE BIC FR 380
- MITSUBISHI PENCIL COMPANY JP 371
- PILOT CORPORATION JP 273
- DELI GROUP COMPANY 249
- SHANGHAI M&G STATIONERY 176
- PENTEL 169
- ZEBRA PEN CORPORATION 153
- GUANGZHOU SHIRUI ELECTRICAL TECHNOLOGY COMPANY 124
Top Applicants (CPC)
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