B23B 2251/20
Number of cutting edges
B23B2251/20 (Number of cutting edges) appears on 150 US grants and 142 published applications in this corpus.
Search patents in B23B- Granted patents
- 150
- Published applications
- 142
- Assignees
- 94
- Inventors
- 302
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 3 |
| 2002 | 3 | 2 |
| 2003 | 3 | 5 |
| 2004 | 3 | 5 |
| 2005 | 4 | 5 |
| 2006 | 3 | 3 |
| 2007 | 2 | 6 |
| 2008 | 5 | 5 |
| 2009 | 7 | 4 |
| 2010 | 0 | 7 |
| 2011 | 3 | 6 |
| 2012 | 4 | 4 |
| 2013 | 2 | 3 |
| 2014 | 5 | 1 |
| 2015 | 2 | 6 |
| 2016 | 6 | 7 |
| 2017 | 7 | 7 |
| 2018 | 3 | 7 |
| 2019 | 11 | 11 |
| 2020 | 2 | 8 |
| 2021 | 9 | 10 |
| 2022 | 6 | 7 |
| 2023 | 4 | 5 |
| 2024 | 6 | 8 |
| 2025 | 3 | 2 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cutting insert, rotary tool, and method for manufacturing machined product8 Sep 2026US 12,728,464 B2KYOCERA Corporation
- Drill and method for manufacturing machined product1 Sep 2026US 12,722,212 B2KYOCERA Corporation
- Micro-reinforced concentric twist drill1 Sep 2026US 12,722,213 B2Shandong Old Roughneck Machinery Technology Co. Ltd
- Rotary tool and method for manufacturing machined product7 Apr 2026US 12,594,611 B2KYOCERA Corporation
- One-piece cutting head for a drill bit17 Feb 2026US 12,551,954 B2Black & Decker Inc.
- Drill and method for manufacturing machined product1 Oct 2026US 2026/0295687 A1KYOCERA Corporation
- Masonry drill having five blades2 Jul 2026US 2026/0183848 A1Hilti Aktiengesellschaft
- Single-flute drill for printed wiring boards2 Jul 2026US 2026/0183849 A1Union Tool Co.
- Two-flute deep-hole drill for stainless steels and other high-alloy steel materials2 Jul 2026US 2026/0183850 A1botek Präzisionsbohrtechnik GmbH
- Masonry drill head7 May 2026US 2026/0124787 A1Ceratizit Hard Material Solutions S.A R.L.
Most cited
By later US patents
- Drill bit point115US 5,273,380 A1993
- Surgical drill114US 4,830,000 AAspen Laboratories, Inc. · 1989
- Coring bit88US 7,189,036 B1Forest City Tool, Inc. · 2007
- Drill bit, hard member, and bit body72US 6,595,305 B1Kennametal Inc. · 2003
- Drill bit for non-linear drilling53US 6,431,801 B1Maxtech Manufacturing Inc. · 2002