DIFF Subgroup
B41N 3/04 Graining or abrasion by mechanical means (chemical graining B41N3/03)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Graining or abrasion by mechanical means
CPC: Graining or abrasion by mechanical means (chemical graining B41N3/03)
Full Title
Full titles differ between systems:
IPC:
Preparing for use or conserving printing surfaces > Graining or abrasion by mechanical means
CPC:
Preparing for use and conserving printing surfaces > Graining or abrasion by mechanical means (chemical graining B41N3/03)
No child classifications to compare. This is a leaf node in both IPC and CPC.
Top Applicants
Top Applicants (IPC)
Class B41,2013–2023, worldwide · Source: EPO PATSTAT
- SEIKO EPSON CORPORATION 14,672
- CANON 14,153
- RICOH COMPANY 8,049
- SEIKO EPSON CORPORATION JP 8,044
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,312
- BROTHER INDUSTRIES 6,887
- KYOCERA DOCUMENT SOLUTIONS 5,463
- CANON JP 5,001
- KONICA MINOLTA CORPORATION 4,512
- BROTHER INDUSTRIES JP 3,681
Top Applicants (CPC)
Class B41,2013–2023, worldwide · Source: EPO PATSTAT
- SEIKO EPSON CORPORATION 8,446
- SEIKO EPSON CORPORATION JP 8,438
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,828
- CANON JP 5,419
- CANON 4,156
- BROTHER INDUSTRIES JP 3,763
- BROTHER INDUSTRIES 2,779
- RICOH COMPANY JP 2,717
- FUJIFILM JP 2,423
- RICOH COMPANY 1,739