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CPC Subgroup
B41B 27/28

Control, indicating, or safety devices for individual operations or machine elements (in devices for supplying molten metal B41B11/86, B41B11/88; for light sources B41B21/08)

Full Title

Control, indicating, or safety devices or systems for composing machines of various kinds or types (computers in general G06F) > Control, indicating, or safety devices for individual operations or machine elements (in devices for supplying molten metal B41B11/86, B41B11/88; for light sources B41B21/08)

9 direct subcodes

Child Classifications

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  • B41B 27/30 for arresting or varying speed of one operation in response to failure or variation in speed of another operation
  • B41B 27/38 for measuring length of composed lines; for reading composed characters
  • B41B 27/40 for proof-printing operations
  • B41B 27/41 Printing mechanisms coupled to typographical composing machines
  • B41B 27/42 for controlling selection or shifting of matrix magazines
  • B41B 27/48 for deleting errors or inserting corrections (means for cancelling or correcting errors in typewriters or selective printing mechanisms B41J29/26)
  • B41B 27/50 operated by coupled machines

Top Applicants

Top 10 applicants by patent filingsfor 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