B23B 2251/404
With decreasing depth in a direction towards the shank from the tool
Official title: with decreasing depth in a direction towards the shank from the tool tip
B23B2251/404 (With decreasing depth in a direction towards the shank from the tool) appears on 21 US grants and 25 published applications in this corpus.
Search patents in B23B- Granted patents
- 21
- Published applications
- 25
- Assignees
- 25
- Inventors
- 60
- Latest grant
- 17 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 2 |
| 2014 | 2 | 2 |
| 2015 | 1 | 0 |
| 2016 | 3 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 3 |
| 2021 | 2 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Drill bit25 May 2021US 11,014,170 B2Bremajek Holdings PTY LTD
- Tapered drill bit and automated process18 Feb 2020US 10,562,109 B2The Boeing Company
- Single-flute drill for printed wiring boards2 Jul 2026US 2026/0183849 A1Union Tool Co.
- Masonry drill head7 May 2026US 2026/0124787 A1Ceratizit Hard Material Solutions S.A R.L.
- Drill14 Nov 2024US 2024/0375191 A1Osg Corporation
- Glass fiber reinforced substrate drill and method of forming through holes in glass fiber reinforced substrate21 Mar 2024US 2024/0091866 A1Ibiden Co., Ltd.
- Twist drill bit23 Mar 2023US 2023/0089637 A1Apex Brands, Inc.
Most cited
By later US patents
- Self-centering drill bit with pilot tip, and process50US 6,050,754 ABlack & Decker Inc. · 2000
- Self-centering drill bit with pilot tip, and process50US 6,190,097 B1Black & Decker Inc. · 2001
- Drill for the insertion of a dental implant45US 5,839,897 A1998
- Roll-forged drill bit37US 6,113,321 ABlack & Decker Inc. · 2000
- Self-centering drill bit with pilot tip33US 7,267,514 B2Black & Decker Inc. · 2007