B23B 2251/24
Overall form of drilling tools
B23B2251/24 (Overall form of drilling tools) appears on 169 US grants and 139 published applications in this corpus.
Search patents in B23B- Granted patents
- 169
- Published applications
- 139
- Assignees
- 100
- Inventors
- 339
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 4 |
| 2003 | 1 | 3 |
| 2004 | 4 | 5 |
| 2005 | 1 | 3 |
| 2006 | 1 | 3 |
| 2007 | 1 | 1 |
| 2008 | 2 | 3 |
| 2009 | 1 | 7 |
| 2010 | 2 | 6 |
| 2011 | 2 | 3 |
| 2012 | 2 | 8 |
| 2013 | 1 | 3 |
| 2014 | 7 | 6 |
| 2015 | 3 | 6 |
| 2016 | 10 | 8 |
| 2017 | 6 | 10 |
| 2018 | 5 | 3 |
| 2019 | 5 | 8 |
| 2020 | 3 | 8 |
| 2021 | 6 | 18 |
| 2022 | 7 | 4 |
| 2023 | 10 | 6 |
| 2024 | 6 | 7 |
| 2025 | 5 | 3 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B23B 2251/241Cross sections of the diameter of the drillIndexing code121
- B23B 2251/247Drilling tools having a working portion at both ends of the shankIndexing code21
- B23B 2251/248Drills in which the outer surface is of special formIndexing code18
- B23B 2251/249Drills in which the shank is flexibleIndexing code3
Recent patents
- Micro-reinforced concentric twist drill1 Sep 2026US 12,722,213 B2Shandong Old Roughneck Machinery Technology Co. Ltd
- Hole-saw with brazed or welded endcap25 Aug 2026US 12,715,053 B2Milwaukee Electric Tool Corporation
- Insert holder having weight-reducing voids and cutting tool21 Jul 2026US 12,686,064 B2Iscar, Ltd.
- Step drill bit2 Jun 2026US 12,643,160 B2Milwaukee Electric Tool Corporation
- Rotary tool and method for manufacturing machined product7 Apr 2026US 12,594,611 B2KYOCERA Corporation
- Single-flute drill for printed wiring boards2 Jul 2026US 2026/0183849 A1Union Tool Co.
- Drill bit with removable sleeve and method for using the same28 May 2026US 2026/0145249 A1Axis Innovations, LLC
- Drilling insert13 Nov 2025US 2025/0345863 A1Milwaukee Electric Tool Corporation
- Cutting tool support for in-situ hole manufacturing4 Sep 2025US 2025/0277459 A1Rtx Corporation
- Drill bit14 Aug 2025US 2025/0256338 A1Techtronic Cordless GP
Most cited
By later US patents
- Surgical drill114US 4,830,000 AAspen Laboratories, Inc. · 1989
- Rotary end cutting tool85US 5,452,971 A1995
- Method of making a sintered body having an internal channel73US 4,881,431 AFried. Krupp Gesellscahft mit beschrankter Haftung · 1989
- Self-centering drill bit with pilot tip73US 4,968,193 ABlack & Decker Inc. · 1990
- Self-centering drill bit with pilot tip64US 5,288,183 ABlack & Decker Inc. · 1994