B23B 2251/241
Cross sections of the diameter of the drill
B23B2251/241 (Cross sections of the diameter of the drill) appears on 121 US grants and 81 published applications in this corpus.
Search patents in B23B- Granted patents
- 121
- Published applications
- 81
- Assignees
- 79
- Inventors
- 254
- Latest grant
- 2 Jun 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 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 4 |
| 2003 | 1 | 2 |
| 2004 | 2 | 3 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 0 | 4 |
| 2010 | 2 | 3 |
| 2011 | 2 | 1 |
| 2012 | 2 | 4 |
| 2013 | 1 | 2 |
| 2014 | 3 | 3 |
| 2015 | 3 | 4 |
| 2016 | 6 | 7 |
| 2017 | 4 | 8 |
| 2018 | 5 | 2 |
| 2019 | 5 | 7 |
| 2020 | 2 | 5 |
| 2021 | 2 | 4 |
| 2022 | 3 | 3 |
| 2023 | 2 | 3 |
| 2024 | 1 | 3 |
| 2025 | 3 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Drill8 Jul 2025US 12,350,744 B2Sumitomo Electric Hardmetal Corp.
- Cutting head having tip portion with radially extending front cutting edges provided with both negative and positive rake angles, and rotary cutting tool17 Jun 2025US 12,330,224 B2Iscar, Ltd.
- Rotary cutting tool with enhanced coolant delivery28 Jan 2025US 12,208,455 B2Kennametal Inc.
- Single-flute drill for printed wiring boards2 Jul 2026US 2026/0183849 A1Union Tool Co.
- Drilling insert13 Nov 2025US 2025/0345863 A1Milwaukee Electric Tool Corporation
- Drill bit14 Aug 2025US 2025/0256338 A1Techtronic Cordless GP
- A combination drill bit and bit driver device11 Jul 2024US 2024/0227038 A1Anchique Pty Ltd
- Multi-groove pagoda drill bit20 Jun 2024US 2024/0198436 A1Danyang Baike Tools Co., Ltd.
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