B23B 2251/406
Of special form not otherwise provided for
Official title: of special form not otherwise provided for
B23B2251/406 (Of special form not otherwise provided for) appears on 131 US grants and 127 published applications in this corpus.
Search patents in B23B- Granted patents
- 131
- Published applications
- 127
- Assignees
- 78
- Inventors
- 283
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 2 |
| 2003 | 3 | 4 |
| 2004 | 0 | 4 |
| 2005 | 2 | 6 |
| 2006 | 2 | 4 |
| 2007 | 7 | 9 |
| 2008 | 3 | 4 |
| 2009 | 4 | 1 |
| 2010 | 2 | 4 |
| 2011 | 2 | 6 |
| 2012 | 4 | 7 |
| 2013 | 4 | 6 |
| 2014 | 2 | 4 |
| 2015 | 6 | 5 |
| 2016 | 6 | 8 |
| 2017 | 3 | 4 |
| 2018 | 6 | 5 |
| 2019 | 6 | 7 |
| 2020 | 4 | 6 |
| 2021 | 7 | 7 |
| 2022 | 2 | 4 |
| 2023 | 4 | 8 |
| 2024 | 2 | 7 |
| 2025 | 1 | 1 |
| 2026 | 6 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Micro-reinforced concentric twist drill1 Sep 2026US 12,722,213 B2Shandong Old Roughneck Machinery Technology Co. Ltd
- Drilling tool18 Aug 2026US 12,708,969 B2Robert Bosch GmbH
- Annular hole cutter21 Apr 2026US 12,605,774 B2Hougen Manufacturing, Inc.
- Body for gun drill21 Apr 2026US 12,605,775 B2Tungaloy Corporation
- Rotary tool and method for manufacturing machined product7 Apr 2026US 12,594,611 B2KYOCERA Corporation
- Efficient drilling tool with strong chip removal ability16 Jul 2026US 2026/0199989 A1Zhuzhou Cemented Carbide Cutting Tools Co., Ltd.
- Single-flute drill for printed wiring boards2 Jul 2026US 2026/0183849 A1Union Tool Co.
- Drill and method of manufacturing machined product25 Jun 2026US 2026/0175301 A1KYOCERA Corporation
- Step drill27 Mar 2025US 2025/0100056 A1Shajeng Hardware Co., Ltd.
- Micro-reinforced concentric twist drill22 Aug 2024US 2024/0278336 A1Shandong Old Roughneck Machinery Technology Co. Ltd
Most cited
By later US patents