Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Main Group
B23K 5/00

Gas flame welding

Introduced: September 1968

Of 9 combined children, 7 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

Navigate with arrow keys, Enter to open

  • B23K 5/003 CPC only CPC only
  • B23K 5/006 CPC only CPC only
  • B23K 5/10 Welding workpieces essentially comprising layers of different metals, e.g. plated workpieces IPC+CPC Available in IPC and CPC
  • B23K 5/18 for purposes other than joining parts, e.g. built-up welding IPC+CPC Available in IPC and CPC
  • B23K 5/20 making use of vibrations, e.g. supersonic vibrations IPC+CPC Available in IPC and CPC
  • B23K 5/213 Preliminary treatment since 1980 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