B23F 21/00
Tools specially adapted for use in machines for manufacturing gear teeth
B23F21/00 (Tools specially adapted for use in machines for manufacturing gear teeth) appears on 454 US grants and 370 published applications in this corpus.
Search patents in B23F- Granted patents
- 454
- Published applications
- 370
- Assignees
- 187
- Inventors
- 701
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 10 | 0 |
| 1986 | 12 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 9 | 0 |
| 1991 | 9 | 0 |
| 1992 | 11 | 0 |
| 1993 | 4 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 9 | 0 |
| 1998 | 6 | 0 |
| 1999 | 9 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 2 |
| 2002 | 5 | 9 |
| 2003 | 13 | 11 |
| 2004 | 2 | 3 |
| 2005 | 6 | 3 |
| 2006 | 3 | 5 |
| 2007 | 0 | 9 |
| 2008 | 5 | 5 |
| 2009 | 2 | 8 |
| 2010 | 2 | 9 |
| 2011 | 1 | 16 |
| 2012 | 12 | 17 |
| 2013 | 10 | 17 |
| 2014 | 17 | 19 |
| 2015 | 12 | 23 |
| 2016 | 20 | 26 |
| 2017 | 17 | 23 |
| 2018 | 25 | 33 |
| 2019 | 28 | 31 |
| 2020 | 28 | 32 |
| 2021 | 23 | 8 |
| 2022 | 15 | 20 |
| 2023 | 8 | 15 |
| 2024 | 14 | 14 |
| 2025 | 8 | 4 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for hard fine machining of two toothings on a workpiece, and gear cutting machine, control program, hard fine machining combination tools and sensor assembly therefor22 Sep 2026US 12,741,330 B2Gleason-Pfauter Maschinenfabrik GmbH
- Near zero degrees cross-axis angle gear cutter and method of gear cutting using such a tool14 Jul 2026US 12,678,873 B2Eaton Intelligent Power Limited
- 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 dressing a multi-flight worm grinding wheel for grinding teeth or similar profiles16 Jun 2026US 12,654,245 B2Kapp Niles GmbH & Co. KG
- Method for the continuous generating grinding of gears, and profiling method24 Sep 2026US 2026/0284762 A1Gleason Switzerland AG
- Tooth Flank Machining Device and Tooth Flank Machining Method13 Aug 2026US 2026/0233318 A1Honda Motor Co., Ltd.
- Tooth Flank Machining Device and Tooth Flank Machining Method13 Aug 2026US 2026/0233319 A1Honda Motor Co., Ltd.
- Method for gear machining at least one workpiece30 Jul 2026US 2026/0216803 A1Liebherr-Verzahntechnik GmbH
- Method and device for producing a modified surface structure on a tooth flank23 Jul 2026US 2026/0208313 A1Reishauer AG
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
- Method for machining gearwheels30US 4,850,155 ALiebherr-Verzahntechnik GmbH · 1989