B23F 21/12
Milling tools
B23F21/12 (Milling tools) appears on 226 US grants and 185 published applications in this corpus.
Search patents in B23F- Granted patents
- 226
- Published applications
- 185
- Assignees
- 103
- Inventors
- 345
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 5 |
| 2003 | 9 | 6 |
| 2004 | 1 | 1 |
| 2005 | 1 | 2 |
| 2006 | 3 | 3 |
| 2007 | 0 | 5 |
| 2008 | 0 | 4 |
| 2009 | 1 | 4 |
| 2010 | 2 | 6 |
| 2011 | 1 | 9 |
| 2012 | 7 | 14 |
| 2013 | 5 | 11 |
| 2014 | 15 | 13 |
| 2015 | 8 | 15 |
| 2016 | 15 | 12 |
| 2017 | 10 | 9 |
| 2018 | 14 | 13 |
| 2019 | 11 | 12 |
| 2020 | 10 | 12 |
| 2021 | 6 | 5 |
| 2022 | 6 | 7 |
| 2023 | 6 | 8 |
| 2024 | 5 | 5 |
| 2025 | 5 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B23F 21/16Hobs102
- B23F 21/22Face-mills for longitudinally-curved gear teeth69
- B23F 21/126With inserted cutting elements25
- B23F 21/14Profile cutters of disc type23
- B23F 21/122Having a shape similar to that of a gear or part thereof18
- B23F 21/20Fly cutters1
- B23F 21/124With cutting teeth disposed on the inner periphery of a ring0
Recent patents
- Hob cutter arrangement14 Jul 2026US 12,678,874 B2Diametal A.G.
- Device and method for producing bevels on tooth flanks of gearwheels16 Jun 2026US 12,654,244 B2Profilator GmbH & Co. KG
- Method for chamfering toothed gear21 Oct 2025US 12,447,542 B2Osg Corporation
- Coating film, tool, and machine tool9 Sep 2025US 12,410,505 B2Nidec Machine Tool Corporation
- Gear machining apparatus8 Jul 2025US 12,350,749 B2Jtekt Corporation
- Milling tool and method for chamfering flank edges of teeth on a cylindrical toothed workpiece25 Jun 2026US 2026/0175303 A1AB Sandvik Coromant
- Tool, gear machining apparatus, and method of machining gear25 Jun 2026US 2026/0175307 A1Jtekt Gear Systems Corporation
- Chamfering tool, chamfering system, gear-cutting machine and method for chamfering toothings20 Feb 2025US 2025/0058389 A1Gleason-Pfauter Maschinenfabrik GmbH
- Method for producing a milling tool, milling tool, and method for producing gear teeth by milling using a milling tool of this kind28 Nov 2024US 2024/0391005 A1Adelbert Haas GmbH
- Workpiece chamfering10 Oct 2024US 2024/0335893 A1FELSOMAT GmbH & Co. KG
Most cited
By later US patents
- Rotary ring cutter having coolant distribution and discharge means51US 5,290,135 AThe Gleason Works · 1994
- Apparatus and method for forming powder metal gears46US 6,517,772 B1Federal-Mogul World Wide, Inc. · 2003
- Threaded grinding wheel and method of dressing41US 6,217,409 B1The Gleason Works · 2001
- Cutter blade with integral coolant passages36US 6,634,835 B1Torque-Traction Technologies, Inc. · 2003
- Gear type flexible coupling28US 4,969,371 ARenold PLC · 1990