F04B 39/0016
With valve arranged in the piston
Official title: {with valve arranged in the piston}
F04B39/0016 (With valve arranged in the piston) appears on 229 US grants and 220 published applications in this corpus.
Search patents in F04B- Granted patents
- 229
- Published applications
- 220
- Assignees
- 128
- Inventors
- 425
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 8 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 4 |
| 2003 | 8 | 12 |
| 2004 | 5 | 8 |
| 2005 | 2 | 4 |
| 2006 | 1 | 5 |
| 2007 | 3 | 12 |
| 2008 | 3 | 6 |
| 2009 | 2 | 2 |
| 2010 | 4 | 4 |
| 2011 | 2 | 3 |
| 2012 | 0 | 1 |
| 2013 | 1 | 4 |
| 2014 | 3 | 5 |
| 2015 | 2 | 12 |
| 2016 | 3 | 2 |
| 2017 | 5 | 17 |
| 2018 | 7 | 16 |
| 2019 | 13 | 15 |
| 2020 | 13 | 15 |
| 2021 | 17 | 21 |
| 2022 | 17 | 21 |
| 2023 | 13 | 8 |
| 2024 | 11 | 5 |
| 2025 | 7 | 14 |
| 2026 | 10 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
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