CPC Subgroup
B41J 9/52 for checking the operation of print hammers
Full Title
Hammer-impression mechanisms > Control for hammer-impression mechanisms > for checking the operation of print hammers
1 direct subcode
Child Classifications
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- B41J 9/54 for checking the breakage of print hammers
Top Applicants
Top 10 applicants by patent filingsfor 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