F02B 39/08
Non-mechanical drives
Official title: Non-mechanical drives, e.g. fluid drives having variable gear ratio
F02B39/08 (Non-mechanical drives) appears on 936 US grants and 1,036 published applications in this corpus.
Search patents in F02B- Granted patents
- 936
- Published applications
- 1,036
- Assignees
- 261
- Inventors
- 1,625
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 7 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 13 | 3 |
| 2002 | 10 | 10 |
| 2003 | 11 | 19 |
| 2004 | 13 | 32 |
| 2005 | 27 | 23 |
| 2006 | 14 | 24 |
| 2007 | 15 | 24 |
| 2008 | 11 | 26 |
| 2009 | 8 | 24 |
| 2010 | 16 | 39 |
| 2011 | 14 | 27 |
| 2012 | 21 | 30 |
| 2013 | 25 | 40 |
| 2014 | 12 | 42 |
| 2015 | 37 | 40 |
| 2016 | 31 | 69 |
| 2017 | 41 | 79 |
| 2018 | 69 | 83 |
| 2019 | 85 | 110 |
| 2020 | 100 | 79 |
| 2021 | 59 | 62 |
| 2022 | 72 | 47 |
| 2023 | 47 | 47 |
| 2024 | 47 | 21 |
| 2025 | 28 | 27 |
| 2026 | 12 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Electrically-assisted turbocharger28 Apr 2026US 12,612,871 B2Jiangsu Easyland Automotive Corporation
- Engine assembly for a motor vehicle and control method thereof10 Sep 2026US 2026/0266230 A1Ferrari S.P. A.
- Electric motor system life evaluation6 Aug 2026US 2026/0227283 A1IHI Corporation
- Control system for vehicle16 Jul 2026US 2026/0200454 A1Toyota Jidosha Kabushiki Kaisha
- Air system and method for engine utilizing electric-assist compressor for purging gases2 Jul 2026US 2026/0185470 A1Caterpillar Inc.
- Electric turbocharger with heat suppression4 Jun 2026US 2026/0153051 A1IHI Corporation
Most cited
By later US patents
- Turbocharging systems for internal combustion engines208US 5,771,868 ATurbodyne Systems, Inc. · 1998
- Turbocharging systems for internal combustion engines197US 6,062,026 ATurbodyne Systems, Inc. · 2000
- Motor-driven centrifugal air compressor with internal cooling airflow134US 6,102,672 ATurbodyne Systems, Inc. · 2000
- Optimized lambda and compression temperature control for compression ignition engines133US 6,273,076 B1Servojet Products International · 2001
- Multiple stage supercharging system131US 5,586,540 A1996