IPC Subgroup
B23F 21/22 Face-mills for longitudinally-curved gear teeth
Introduced: September 1968
Last revised: January 2006
Full Title
Tools specially adapted for use in machines for manufacturing gear teeth > Milling tools > Face-mills for longitudinally-curved gear teeth
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- Subclass:
- MAKING GEARS OR TOOTHED RACKS
1 direct subcode
Child Classifications
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- B23F 21/23 with cutter teeth arranged on a spiral curve for continuous generating processes
Top Applicants
Top 10 applicants by patent filingsfor 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