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PCE
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DIFF Subgroup
B23K 37/053

aligning cylindrical work; Clamping devices therefor

Introduced: January 1990

Full Title

Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass > for holding or positioning work > aligning cylindrical work; Clamping devices therefor

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

IPC defines codes here since 2025.

Child Classifications

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  • B23K 37/0531 Internal pipe alignment clamps since 2025 IPC+CPC Available in IPC and CPC
  • B23K 37/0533 External pipe alignment clamps since 2025 IPC+CPC Available in IPC and CPC
  • B23K 37/0535 Longitudinal pipe seam alignment clamps since 2025 IPC+CPC Available in IPC and CPC
  • B23K 37/0536 for maintaining flanges on tubes since 2025 IPC+CPC Available in IPC and CPC
  • B23K 37/0538 for rotating tubes, e.g. rollers since 2025 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