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PCE
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DIFF Subgroup
B23F 5/20

by milling

Introduced: September 1968

Full Title

Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made > by milling

Of 6 combined children, 4 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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  • B23F 5/202 CPC only CPC only
  • B23F 5/22 the tool being a hob for making spur gears IPC+CPC Available in IPC and CPC
  • B23F 5/24 the tool being a hob for making bevel gears IPC+CPC Available in IPC and CPC
  • B23F 5/26 the tool having the same profile as a tooth or teeth of a rack, for making spur gears IPC+CPC Available in IPC and CPC
  • B23F 5/27 the tool having the same profile as a tooth or teeth of a crown or bevel wheel since 1974 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B23,2013–2023, worldwide · Source: EPO PATSTAT

  1. ITW (ILLINOIS TOOL WORKS) US 3,407
  2. FANUC JP 3,120
  3. DISCO ABRASIVE SYSTEM 2,777
  4. HAN'S LASER TECHNOLOGY INDUSTRY GROUP COMPANY 2,629
  5. ROBERT BOSCH DE 2,468
  6. FANUC 2,273
  7. DISCO CORPORATION JP 2,267
  8. GE (GENERAL ELECTRIC COMPANY) US 1,611
  9. CHINESE ACADEMY OF SCIENCES 1,534
  10. ISCAR IL 1,499

Top Applicants (CPC)

Class B23,2013–2023, worldwide · Source: EPO PATSTAT

  1. ITW (ILLINOIS TOOL WORKS) US 3,642
  2. DISCO CORPORATION JP 3,316
  3. FANUC JP 3,111
  4. ROBERT BOSCH DE 2,711
  5. FANUC 2,163
  6. GE (GENERAL ELECTRIC COMPANY) US 2,113
  7. ISCAR IL 1,516
  8. SIEMENS DE 1,459
  9. LINCOLN GLOBAL US 1,433
  10. KOBE STEEL JP 1,423