B23B 31/12
Chucks with simultaneously-acting jaws, whether or not also individually adjustable
B23B31/12 (Chucks with simultaneously-acting jaws, whether or not also individually adjustable) appears on 2,032 US grants and 1,331 published applications in this corpus.
Search patents in B23B- Granted patents
- 2,032
- Published applications
- 1,331
- Assignees
- 772
- Inventors
- 2,477
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 31 | 0 |
| 1977 | 29 | 0 |
| 1978 | 31 | 0 |
| 1979 | 10 | 0 |
| 1980 | 30 | 0 |
| 1981 | 38 | 0 |
| 1982 | 21 | 0 |
| 1983 | 21 | 0 |
| 1984 | 31 | 0 |
| 1985 | 43 | 0 |
| 1986 | 50 | 0 |
| 1987 | 60 | 0 |
| 1988 | 30 | 0 |
| 1989 | 43 | 0 |
| 1990 | 33 | 0 |
| 1991 | 39 | 0 |
| 1992 | 40 | 0 |
| 1993 | 34 | 0 |
| 1994 | 42 | 0 |
| 1995 | 37 | 0 |
| 1996 | 33 | 0 |
| 1997 | 27 | 0 |
| 1998 | 48 | 0 |
| 1999 | 63 | 0 |
| 2000 | 43 | 0 |
| 2001 | 64 | 27 |
| 2002 | 58 | 40 |
| 2003 | 60 | 50 |
| 2004 | 28 | 50 |
| 2005 | 37 | 53 |
| 2006 | 28 | 75 |
| 2007 | 40 | 61 |
| 2008 | 30 | 44 |
| 2009 | 31 | 42 |
| 2010 | 40 | 50 |
| 2011 | 34 | 46 |
| 2012 | 34 | 39 |
| 2013 | 36 | 55 |
| 2014 | 49 | 72 |
| 2015 | 41 | 62 |
| 2016 | 57 | 50 |
| 2017 | 52 | 63 |
| 2018 | 59 | 55 |
| 2019 | 59 | 53 |
| 2020 | 48 | 64 |
| 2021 | 56 | 78 |
| 2022 | 45 | 57 |
| 2023 | 32 | 47 |
| 2024 | 33 | 38 |
| 2025 | 37 | 30 |
| 2026 | 37 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B23B 31/20Longitudinally-split sleeves628
- B23B 31/1207Moving obliquely to the axis of the chuck in a plane containing607
- B23B 31/16Moving radially572
- B23B 31/18Pivotally movable in planes containing the axis of the chuck104
- B23B 31/14Involving the use of centrifugal force65
- B23B 31/1261Pivotally movable in a radial plane59
- B23B 31/22Jaws in the form of balls52
- B23B 31/19Moving parallel to the axis of the chuck45
All 10 subgroupsShow fewer
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