B23B 2251/446
Drills with variable margins
B23B2251/446 (Drills with variable margins) appears on 20 US grants and 21 published applications in this corpus.
Search patents in B23B- Granted patents
- 20
- Published applications
- 21
- Assignees
- 19
- Inventors
- 41
- Latest grant
- 20 Aug 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 2 |
| 2015 | 0 | 3 |
| 2016 | 1 | 1 |
| 2017 | 4 | 0 |
| 2018 | 3 | 2 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Drill and method for producing a drill20 Aug 2024US 12,064,819 B2Kennametal Inc.
- Drill and method for producing a drill25 Jul 2023US 11,707,791 B2Kennametal Inc.
- Rotary tool26 Apr 2022US 11,311,947 B2KYOCERA Corporation
- Drill bit21 Sep 2021US 11,123,809 B2Black & Decker Inc.
- Drilling tool30 Jun 2020US 10,695,951 B2Robert Bosch GmbH
- Drill and method of manufacturing machined product25 Jun 2026US 2026/0175301 A1KYOCERA Corporation
- Drill and method for producing a drill13 Jul 2023US 2023/0219147 A1Kennametal Inc.
- Drill bit15 Dec 2022US 2022/0395914 A1Technische Universität Darmstadt
- Drill and method for producing a drill11 Feb 2021US 2021/0039176 A1Kennametal Inc.
- Rotary tool16 Apr 2020US 2020/0114434 A1KYOCERA Corporation
Most cited
By later US patents
- Drill bit or end mill with grooved flutes73US 5,160,232 AMCA Micro Crystal AG · 1992
- Twist drill35US 5,350,261 AMitsubishi Materials Corporation · 1994
- Drill30US 4,561,813 AM. A. Ford Mfg. Co., Inc. · 1985
- Drill13US 6,250,857 B1Gebrüder Heller Drinklage GmbH · 2001
- Twist drill10US 9,539,653 B2Walter AG · 2017