B23B 2233/20
Centres or drivers with convex surfaces
B23B2233/20 (Centres or drivers with convex surfaces) appears on 7 US grants and 3 published applications in this corpus.
Search patents in B23B- Granted patents
- 7
- Published applications
- 3
- Assignees
- 3
- Inventors
- 9
- Latest grant
- 9 Mar 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 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 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Centering guide cage apparatus for interior wall drilling9 Mar 2021US 10,940,544 B2
- Adjustable pipe center and method21 Apr 2020US 10,625,346 B2
- Cutting insert and method of making the same3 Aug 2004US 6,769,844 B2Kennametal Inc.
- Dead center for machine tools28 Sep 1999US 5,957,017 A
- Workholding apparatus25 Aug 1998US 5,797,605 AThe Gleason Works
Most cited
By later US patents
- Cutting insert and method of making the same34US 6,769,844 B2Kennametal Inc. · 2004
- Method and apparatus for machining hardened parts apparatus for machining hardened parts12US 5,527,400 ADana Corporation · 1996
- Workholding apparatus10US 5,797,605 AThe Gleason Works · 1998
- Centering apparatus2US 4,075,915 A1978
- Dead center for machine tools2US 5,957,017 A1999