B23F 21/02
Grinding discs
Official title: Grinding discs; Grinding worms (truing grinding tools B24B; grinding tools in general B24D)
B23F21/02 (Grinding discs) appears on 68 US grants and 63 published applications in this corpus.
Search patents in B23F- Granted patents
- 68
- Published applications
- 63
- Assignees
- 48
- Inventors
- 135
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 3 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 4 | 1 |
| 2013 | 1 | 3 |
| 2014 | 2 | 3 |
| 2015 | 3 | 4 |
| 2016 | 2 | 4 |
| 2017 | 2 | 4 |
| 2018 | 1 | 3 |
| 2019 | 6 | 6 |
| 2020 | 4 | 2 |
| 2021 | 2 | 0 |
| 2022 | 3 | 6 |
| 2023 | 1 | 5 |
| 2024 | 3 | 4 |
| 2025 | 0 | 2 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Multilayer grindstone for gear grinding31 Dec 2024US 12,179,278 B2Noritake Co., Limited
- Method for cutting a gear, gear-cutting tool and gear-cutting machine19 Nov 2024US 12,145,209 B2Gleason Cutting Tools Corporation
- Method for grinding a gear wheel by means of a worm grinding wheel, and a dressing roll for dressing the worm grinding wheel29 Oct 2024US 12,128,491 B2Kapp Niles GmbH & Co. KG
- Method and grinding machine for grinding a gear wheel workpiece24 Jan 2023US 11,559,843 B2Klingelnberg GmbH
- 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
- Threaded grinding wheel and method of dressing41US 6,217,409 B1The Gleason Works · 2001
- Method for machining gearwheels30US 4,850,155 ALiebherr-Verzahntechnik GmbH · 1989
- Machine tool for fine machining the tooth flanks of pretoothed gearwheels30US 4,961,289 ALiebherr-Verzahntecknik GmbH · 1990
- Method and device for fine profiling tools coated with super-hard materials27US 4,533,812 AKapp & Co. Werkzeugmaschinenfabrik · 1985
- Machining and apparatus24US 5,129,190 AEaton Corporation · 1992