B23B 2251/408
Spiral grooves
B23B2251/408 (Spiral grooves) appears on 111 US grants and 95 published applications in this corpus.
Search patents in B23B- Granted patents
- 111
- Published applications
- 95
- Assignees
- 63
- Inventors
- 193
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 3 |
| 2010 | 0 | 2 |
| 2011 | 2 | 3 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 5 |
| 2015 | 0 | 6 |
| 2016 | 6 | 8 |
| 2017 | 6 | 9 |
| 2018 | 9 | 9 |
| 2019 | 8 | 8 |
| 2020 | 3 | 9 |
| 2021 | 5 | 10 |
| 2022 | 8 | 6 |
| 2023 | 3 | 2 |
| 2024 | 3 | 4 |
| 2025 | 1 | 2 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Annular hole cutter21 Apr 2026US 12,605,774 B2Hougen Manufacturing, Inc.
- Rotary tool and method for manufacturing machined product7 Apr 2026US 12,594,611 B2KYOCERA Corporation
- Machining system and cutting insert and methods17 Mar 2026US 12,576,453 B2Allied Machine & Engineering Corp.
- Rotary cutting tool with enhanced coolant delivery28 Jan 2025US 12,208,455 B2Kennametal Inc.
- Cutting tool10 Sep 2024US 12,083,605 B2Tungaloy Corporation
- Drill5 Mar 2026US 2026/0061501 A1Sumitomo Electric Hardmetal Corp.
- Cutting tool31 Jul 2025US 2025/0242414 A1Tungaloy Corporation
- Rotary Tool and Method for Manufacturing Such a Rotary Tool16 Jan 2025US 2025/0018480 A1
- Drilling tool14 Nov 2024US 2024/0375192 A1Milwaukee Electric Tool Corporation
- A combination drill bit and bit driver device11 Jul 2024US 2024/0227038 A1Anchique Pty Ltd
Most cited
By later US patents
- Cutting insert with undulating concave chip forming groove57US 5,695,303 AIscar, Ltd. · 1997
- Plug cutter with radial relief56US 5,810,524 AWoodworker's Supply, Inc. · 1998
- Annular hole cutter37US 4,452,554 A1984
- Indexable insert drill and an insert with a symmetrical drill point and cutting edges of different lengths37US 5,340,246 ASandvik AB · 1994
- Drill with coolant channels and method for its manufacture36US 5,676,499 ASandvik AB · 1997