B23F 21/16
Hobs
B23F21/16 (Hobs) appears on 102 US grants and 73 published applications in this corpus.
Search patents in B23F- Granted patents
- 102
- Published applications
- 73
- Assignees
- 64
- Inventors
- 164
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 2 |
| 2003 | 3 | 3 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 3 |
| 2010 | 0 | 3 |
| 2011 | 1 | 3 |
| 2012 | 3 | 6 |
| 2013 | 2 | 4 |
| 2014 | 6 | 6 |
| 2015 | 4 | 5 |
| 2016 | 6 | 3 |
| 2017 | 2 | 4 |
| 2018 | 5 | 5 |
| 2019 | 6 | 8 |
| 2020 | 5 | 5 |
| 2021 | 2 | 1 |
| 2022 | 4 | 2 |
| 2023 | 2 | 3 |
| 2024 | 0 | 0 |
| 2025 | 3 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hob cutter arrangement14 Jul 2026US 12,678,874 B2Diametal A.G.
- 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
- Method for manufacturing sintered gear18 Feb 2025US 12,226,860 B2Sumitomo Electric Industries, Ltd.
- Indexable tangential railway wheel milling inserts and cutting tool holders14 Mar 2023US 11,602,796 B2Kennametal Inc.
- Chamfering tool, chamfering system, gear-cutting machine and method for chamfering toothings20 Feb 2025US 2025/0058389 A1Gleason-Pfauter Maschinenfabrik GmbH
- Tool and machining device and method of machining2 Nov 2023US 2023/0347428 A1Nidec Machine Tool Corporation
- Coating film, tool, and machine tool7 Sep 2023US 2023/0279535 A1Nidec Machine Tool Corporation
- Hob cutter arrangement17 Aug 2023US 2023/0256529 A1Diametal A.G.
- Method for manufacturing sintered gear21 Jul 2022US 2022/0226944 A1Sumitomo Electric Industries, Ltd.
Most cited
By later US patents
- 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
- Multiple-part hobbing cutter21US 4,218,159 ASack GmbH · 1980