B23B 2251/50
Drilling tools comprising cutting inserts
B23B2251/50 (Drilling tools comprising cutting inserts) appears on 346 US grants and 267 published applications in this corpus.
Search patents in B23B- Granted patents
- 346
- Published applications
- 267
- Assignees
- 131
- Inventors
- 534
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 8 | 0 |
| 1992 | 5 | 0 |
| 1993 | 10 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 9 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 5 |
| 2002 | 4 | 9 |
| 2003 | 10 | 7 |
| 2004 | 5 | 16 |
| 2005 | 5 | 18 |
| 2006 | 18 | 15 |
| 2007 | 8 | 12 |
| 2008 | 11 | 13 |
| 2009 | 14 | 12 |
| 2010 | 5 | 16 |
| 2011 | 7 | 12 |
| 2012 | 7 | 5 |
| 2013 | 14 | 11 |
| 2014 | 9 | 13 |
| 2015 | 13 | 14 |
| 2016 | 8 | 15 |
| 2017 | 12 | 16 |
| 2018 | 18 | 11 |
| 2019 | 11 | 17 |
| 2020 | 10 | 13 |
| 2021 | 11 | 9 |
| 2022 | 8 | 2 |
| 2023 | 3 | 4 |
| 2024 | 3 | 1 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Machining system and cutting insert and methods17 Mar 2026US 12,576,453 B2Allied Machine & Engineering Corp.
- Step drill bit7 Oct 2025US 12,434,308 B2Milwaukee Electric Tool Corporation
- Drill fire extinguishing device and drill fire extinguishing system, drill bit2 Sep 2025US 12,403,341 B2PUTZ INNOVA GmbH
- Cutting tool and method for manufacturing a cutting tool30 Apr 2024US 11,969,837 B2Kennametal Inc.
- Modular drill apparatus with cutting tip in situ insert assembly5 Mar 2024US 11,919,094 B2Kennametal Inc.
- Step drill bit18 Dec 2025US 2025/0381604 A1Milwaukee Electric Tool Corporation
- Modular drill with enhanced bump-off capability8 Feb 2024US 2024/0042530 A1Kennametal Inc.
- Drill systems with coolant delivery arrangements and methods13 Jul 2023US 2023/0219148 A1
- Cutting insert with internal cooling, mold and method for manufacture thereof23 Feb 2023US 2023/0059599 A1No Screw Ltd.
- Modular drill apparatus with cutting tip in situ insert assembly26 Jan 2023US 2023/0022019 A1Kennametal Inc.
Most cited
By later US patents
- Manual tool for removing material from brittle and/or non-ductile stock416US 5,733,074 AHilti Aktiengesellschaft · 1998
- Sintered and forged article, and method of forming same145US 4,484,644 AIngersoll-Rand Company · 1984
- Tubular hole cutter112US 6,786,684 B12004
- Sintered diamond drill bits and method of making106US 5,443,337 A1995
- Drill bits97US 5,464,068 A1995