F02B 33/38
Of roots type
Official title: of Roots type
F02B33/38 (Of roots type) appears on 207 US grants and 178 published applications in this corpus.
Search patents in F02B- Granted patents
- 207
- Published applications
- 178
- Assignees
- 68
- Inventors
- 325
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 10 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 2 | 7 |
| 2005 | 6 | 7 |
| 2006 | 4 | 6 |
| 2007 | 4 | 6 |
| 2008 | 3 | 12 |
| 2009 | 9 | 3 |
| 2010 | 5 | 7 |
| 2011 | 4 | 9 |
| 2012 | 7 | 8 |
| 2013 | 5 | 4 |
| 2014 | 9 | 8 |
| 2015 | 6 | 8 |
| 2016 | 5 | 17 |
| 2017 | 5 | 17 |
| 2018 | 7 | 15 |
| 2019 | 13 | 14 |
| 2020 | 9 | 9 |
| 2021 | 12 | 5 |
| 2022 | 5 | 4 |
| 2023 | 8 | 7 |
| 2024 | 4 | 2 |
| 2025 | 3 | 1 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Supercharger22 Sep 2026US 12,742,412 B2Eaton Intelligent Power Limited
- Supercharged internal combustion engine with intake port timing shutters controlling the air mass flowing into the supercharger31 Mar 2026US 12,590,584 B2
- Cartridge style front cover and coupling cavity sleeve for automotive supercharger31 Mar 2026US 12,590,585 B2Eaton Intelligent Power Limited
- Supercharger modifications23 Dec 2025US 12,503,974 B1Kong Performance LLC
- Supercharged internal combustion engine21 Jan 2025US 12,203,406 B2
- Supercharged internal combustion engine2 Jan 2025US 2025/0003363 A1Hansen Engine Corporation
- Supercharged internal combustion engine5 Sep 2024US 2024/0295189 A1Hansen Engine Corporation
- Method and Apparatus for Transferring Auxiliary Power from an Engine Crankshaft Output to a Supercharger Input That Circumvents Belt Path Obstacles22 Aug 2024US 2024/0280047 A1Magnuson Products, LLC
- Boost regulator for supercharger bypass valve28 Dec 2023US 2023/0417176 A1Hamburger's Specialty Vehicles, Inc.
- Egr pump system and control method of egr pump23 Nov 2023US 2023/0374958 A1Eaton Intelligent Power Limited
Most cited
By later US patents
- Spark-assist type self-ignition engine92US 6,293,246 B1Toyota Jidosha Kabushiki Kaisha · 2001
- Internal combustion engine83US 6,279,550 B12001
- Cold air super-charged internal combustion engine, working cycle and method69US 6,951,211 B22005
- Supercharger pulley isolator49US 5,893,355 AEaton Corporation · 1999
- Outboard motor42US 5,261,356 ASanshin Kogyo Kabushiki Kaisha · 1993