DIFF Subgroup
B23B 5/36 for turning specially-shaped surfaces by making use of relative movement of the tool and work produced by geometrical mechanisms, i.e. forming-lathes
Introduced: September 1968
Full Title
Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor > for turning specially-shaped surfaces by making use of relative movement of the tool and work produced by geometrical mechanisms, i.e. forming-lathes
Of 6 combined children, 3 exist in both systems.
1 codes are CPC-only extensions, 2 exist only in IPC.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B23B 5/38 for turning conical surfaces inside or outside, e.g. taper pins IPC+CPC Available in IPC and CPC
- B23B 5/44 for turning polygonal or other non-circular surfaces controlled by gear or guide mechanisms, i.e. eccentric lathes IPC only IPC only
- B23B 5/46 for turning helical or spiral surfaces (thread cutting B23G) IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B23,2013–2023, worldwide · Source: EPO PATSTAT
- ITW (ILLINOIS TOOL WORKS) US 3,407
- FANUC JP 3,120
- DISCO ABRASIVE SYSTEM 2,777
- HAN'S LASER TECHNOLOGY INDUSTRY GROUP COMPANY 2,629
- ROBERT BOSCH DE 2,468
- FANUC 2,273
- DISCO CORPORATION JP 2,267
- GE (GENERAL ELECTRIC COMPANY) US 1,611
- CHINESE ACADEMY OF SCIENCES 1,534
- ISCAR IL 1,499
Top Applicants (CPC)
Class B23,2013–2023, worldwide · Source: EPO PATSTAT
- ITW (ILLINOIS TOOL WORKS) US 3,642
- DISCO CORPORATION JP 3,316
- FANUC JP 3,111
- ROBERT BOSCH DE 2,711
- FANUC 2,163
- GE (GENERAL ELECTRIC COMPANY) US 2,113
- ISCAR IL 1,516
- SIEMENS DE 1,459
- LINCOLN GLOBAL US 1,433
- KOBE STEEL JP 1,423