F04C 2/3442
The surfaces of the inner and outer member, forming the working space
Official title: {the surfaces of the inner and outer member, forming the working space, being surfaces of revolution}
F04C2/3442 (The surfaces of the inner and outer member, forming the working space) appears on 246 US grants and 273 published applications in this corpus.
Search patents in F04C- Granted patents
- 246
- Published applications
- 273
- Assignees
- 122
- Inventors
- 416
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 5 | 3 |
| 2003 | 5 | 3 |
| 2004 | 2 | 3 |
| 2005 | 3 | 8 |
| 2006 | 4 | 5 |
| 2007 | 4 | 3 |
| 2008 | 3 | 21 |
| 2009 | 5 | 30 |
| 2010 | 6 | 15 |
| 2011 | 14 | 6 |
| 2012 | 17 | 12 |
| 2013 | 19 | 19 |
| 2014 | 6 | 14 |
| 2015 | 13 | 27 |
| 2016 | 17 | 15 |
| 2017 | 24 | 10 |
| 2018 | 13 | 11 |
| 2019 | 10 | 12 |
| 2020 | 7 | 22 |
| 2021 | 10 | 10 |
| 2022 | 11 | 8 |
| 2023 | 10 | 7 |
| 2024 | 7 | 5 |
| 2025 | 5 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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