F04C 2/084
Toothed wheels
Official title: {Toothed wheels}
F04C2/084 (Toothed wheels) appears on 471 US grants and 496 published applications in this corpus.
Search patents in F04C- Granted patents
- 471
- Published applications
- 496
- Assignees
- 298
- Inventors
- 908
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 8 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 12 | 0 |
| 2001 | 11 | 2 |
| 2002 | 4 | 6 |
| 2003 | 9 | 3 |
| 2004 | 6 | 15 |
| 2005 | 6 | 10 |
| 2006 | 5 | 17 |
| 2007 | 4 | 22 |
| 2008 | 8 | 13 |
| 2009 | 20 | 15 |
| 2010 | 7 | 18 |
| 2011 | 5 | 9 |
| 2012 | 15 | 11 |
| 2013 | 8 | 16 |
| 2014 | 18 | 25 |
| 2015 | 16 | 34 |
| 2016 | 23 | 34 |
| 2017 | 23 | 31 |
| 2018 | 22 | 42 |
| 2019 | 27 | 28 |
| 2020 | 22 | 26 |
| 2021 | 31 | 21 |
| 2022 | 23 | 21 |
| 2023 | 16 | 14 |
| 2024 | 24 | 27 |
| 2025 | 18 | 22 |
| 2026 | 12 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Positive displacement screw pump having pressure feedback control67US 5,348,453 AJames River Corporation of Virginia · 1994
- Hydraulic machine having teeth formed by rollers54US 5,595,479 ADanfoss A/S · 1997
- Method for making herringbone gears54US 5,865,239 AMicropump, Inc. · 1999
- Reverse Moineau motor and centrifugal pump assembly for producing fluids from a well46US 5,611,397 A1997
- Progressive cavity motors using composite materials44US 6,183,226 B22001