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DIFF Subgroup
B41L 11/14

Constructional features of masters (chemical aspects B41M)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Constructional features of masters

CPC: Constructional features of masters (chemical aspects B41M)

Full Title

Full titles differ between systems:

IPC:

Apparatus for directly duplicating from hectographic masters in mirror image, i.e. "wet duplicators" for producing positive copies > Constructional features of masters

CPC:

Apparatus for directly duplicating from hectographic masters in mirror image, i.e. "wet duplicators" for producing positive copies > Constructional features of masters (chemical aspects B41M)

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

  1. SEIKO EPSON CORPORATION 14,672
  2. CANON 14,153
  3. RICOH COMPANY 8,049
  4. SEIKO EPSON CORPORATION JP 8,044
  5. HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,312
  6. BROTHER INDUSTRIES 6,887
  7. KYOCERA DOCUMENT SOLUTIONS 5,463
  8. CANON JP 5,001
  9. KONICA MINOLTA CORPORATION 4,512
  10. BROTHER INDUSTRIES JP 3,681

Top Applicants (CPC)

Class B41,2013–2023, worldwide · Source: EPO PATSTAT

  1. SEIKO EPSON CORPORATION 8,446
  2. SEIKO EPSON CORPORATION JP 8,438
  3. HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,828
  4. CANON JP 5,419
  5. CANON 4,156
  6. BROTHER INDUSTRIES JP 3,763
  7. BROTHER INDUSTRIES 2,779
  8. RICOH COMPANY JP 2,717
  9. FUJIFILM JP 2,423
  10. RICOH COMPANY 1,739