F02F 1/183
Oval or square cylinders
Official title: {Oval or square cylinders}
F02F1/183 (Oval or square cylinders) appears on 48 US grants and 23 published applications in this corpus.
Search patents in F02F- Granted patents
- 48
- Published applications
- 23
- Assignees
- 19
- Inventors
- 61
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 7 |
| 2019 | 0 | 4 |
| 2020 | 7 | 1 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Internal combustion engine and cylinder block13 Jan 2026US 12,523,187 B2Isuzu Motors Limited
- Driving engine for vehicles30 Sep 2025US 12,429,011 B2Ferrari S.P. A.
- Internal combustion engine4 Jun 2024US 12,000,354 B2Isuzu Motors Limited
- Cylinder head17 Aug 2021US 11,092,044 B2Mazda Motor Corporation
- Internal combustion engine22 Jun 2021US 11,041,456 B2Quest Engines, LLC
- Internal combustion engine12 Feb 2026US 2026/0043373 A1
- Internal combustion engine12 Feb 2026US 2026/0043374 A1
- Driving engine for vehicles6 Mar 2025US 2025/0075671 A1Ferrari S.P. A.
- Internal combustion engine and cylinder block3 Oct 2024US 2024/0328370 A1Isuzu Motors Limited
- Internal combustion engine19 Oct 2023US 2023/0332558 A1Isuzu Motors Limited
Most cited
By later US patents
- Internal combustion engines and method of operting an internal combustion engine using staged combustion35US 5,076,229 A1991
- Dual compression and dual expansion internal combustion engine and method therefor31US 5,542,382 ACaterpillar Inc. · 1996
- Internal combustion engine24US 4,383,508 AHonda Giken Kogyo Kabushiki Kaisha · 1983
- Four-cycle internal combustion engine and associated methods of fuel combustion22US 4,363,300 AHonda Giken Kogyo Kabushiki Kaisha · 1982
- Piston structure for internal combustion engine18US 5,058,489 AAtsugi Unisia Corporation · 1991