B23B 2251/043
Helix angles
B23B2251/043 (Helix angles) appears on 100 US grants and 119 published applications in this corpus.
Search patents in B23B- Granted patents
- 100
- Published applications
- 119
- Assignees
- 69
- Inventors
- 233
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 4 |
| 2005 | 1 | 3 |
| 2006 | 4 | 7 |
| 2007 | 4 | 3 |
| 2008 | 1 | 2 |
| 2009 | 3 | 5 |
| 2010 | 2 | 3 |
| 2011 | 1 | 2 |
| 2012 | 3 | 7 |
| 2013 | 2 | 3 |
| 2014 | 3 | 5 |
| 2015 | 2 | 7 |
| 2016 | 5 | 6 |
| 2017 | 7 | 5 |
| 2018 | 7 | 8 |
| 2019 | 7 | 11 |
| 2020 | 6 | 10 |
| 2021 | 6 | 9 |
| 2022 | 7 | 4 |
| 2023 | 5 | 6 |
| 2024 | 2 | 3 |
| 2025 | 1 | 0 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Annular hole cutter21 Apr 2026US 12,605,774 B2Hougen Manufacturing, Inc.
- Drill17 Mar 2026US 12,576,452 B2Mitsubishi Materials Corporation
- Drill bit13 May 2025US 12,296,395 B2Milwaukee Electric Tool Corporation
- Combination tool as well as drills for such a drilling/chamfering tool26 Nov 2024US 12,151,293 B2Kennametal Inc.
- Veined tool blank and drill20 Aug 2026US 2026/0241498 A1AB Sandvik Coromant
- Drill18 Jun 2026US 2026/0166633 A1Robert Bosch GmbH
- Masonry drill head7 May 2026US 2026/0124787 A1Ceratizit Hard Material Solutions S.A R.L.
- Drill5 Mar 2026US 2026/0061501 A1Sumitomo Electric Hardmetal Corp.
- Drilling tool14 Nov 2024US 2024/0375192 A1Milwaukee Electric Tool Corporation
Most cited
By later US patents
- Precision drill bits49US 6,652,203 B1Credo Technology Corporation · 2003
- Single flute drill for drilling holes in printed circuit boards and method of drilling holes in a printed circuit board43US 5,584,617 AInternational Business Machines Corporation · 1996
- Drill having helical flute for discharging cutting fluid41US 5,478,176 ASeco Tools AB · 1995
- Stagger cut teeth39US 5,876,202 A1999
- Twist drill with a pilot tip38US 7,520,703 B2Black & Decker Inc. · 2009