F02B 53/00
Internal-combustion aspects of rotary-piston or oscillating-piston engines
Official title: Internal-combustion aspects of rotary-piston or oscillating-piston engines (internal-combustion aspects of rotary pistons or outer members for co-operation therewith F02B55/00)
F02B53/00 (Internal-combustion aspects of rotary-piston or oscillating-piston engines) appears on 1,367 US grants and 773 published applications in this corpus.
Search patents in F02B- Granted patents
- 1,367
- Published applications
- 773
- Assignees
- 300
- Inventors
- 1,522
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 112 | 0 |
| 1977 | 62 | 0 |
| 1978 | 49 | 0 |
| 1979 | 25 | 0 |
| 1980 | 29 | 0 |
| 1981 | 8 | 0 |
| 1982 | 16 | 0 |
| 1983 | 18 | 0 |
| 1984 | 22 | 0 |
| 1985 | 15 | 0 |
| 1986 | 13 | 0 |
| 1987 | 28 | 0 |
| 1988 | 20 | 0 |
| 1989 | 24 | 0 |
| 1990 | 25 | 0 |
| 1991 | 17 | 0 |
| 1992 | 25 | 0 |
| 1993 | 29 | 0 |
| 1994 | 24 | 0 |
| 1995 | 31 | 0 |
| 1996 | 29 | 0 |
| 1997 | 11 | 0 |
| 1998 | 20 | 0 |
| 1999 | 7 | 0 |
| 2000 | 18 | 0 |
| 2001 | 22 | 4 |
| 2002 | 29 | 25 |
| 2003 | 27 | 34 |
| 2004 | 25 | 33 |
| 2005 | 26 | 44 |
| 2006 | 18 | 26 |
| 2007 | 10 | 27 |
| 2008 | 14 | 30 |
| 2009 | 14 | 24 |
| 2010 | 20 | 29 |
| 2011 | 9 | 26 |
| 2012 | 18 | 19 |
| 2013 | 26 | 28 |
| 2014 | 25 | 40 |
| 2015 | 26 | 42 |
| 2016 | 39 | 46 |
| 2017 | 30 | 43 |
| 2018 | 48 | 44 |
| 2019 | 44 | 39 |
| 2020 | 49 | 41 |
| 2021 | 40 | 36 |
| 2022 | 39 | 23 |
| 2023 | 25 | 19 |
| 2024 | 38 | 18 |
| 2025 | 21 | 23 |
| 2026 | 8 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tool for assembly and storage of rotary engine6 Oct 2026US 12,752,382 B2Pratt & Whitney Canada Corp.
- Fretting resistant rotary engine housings18 Aug 2026US 12,709,983 B2Pratt & Whitney Canada Corp.
- Laminated universal effort machine30 Jun 2026US 12,669,081 B1
- Tractor aircraft power plant with swirl recovery vanes2 Jun 2026US 12,644,407 B2Pratt & Whitney Canada Corp.
- Reciprocating internal combustion engine26 May 2026US 12,637,973 B2Aisin Corporation
- Rotary internal combustion engine with integrated pump8 Oct 2026US 2026/0309074 A1Pratt & Whitney Canada Corp.
- Rotational Engine With Inner and Outer Rings17 Sep 2026US 2026/0275867 A1Duplicent, LLC
- Rotary machine17 Sep 2026US 2026/0275868 A1Lumenium LLC
- Rotary engine with internal arc-sector actuation27 Aug 2026US 2026/0251090 A1
- Egr system for rotary engine13 Aug 2026US 2026/0235067 A1Mazda Motor Corporation
Most cited
By later US patents
- External combustion slidable vane motor with air cushions149US 4,672,813 A1987
- Internal combustion engine with compound air compression138US 5,362,219 A1994
- Rotary positive displacement device134US 5,431,551 A1995
- Method of operating an engine assembly114US 10,590,867 B2Pratt & Whitney Canada Corp. · 2020
- Compound cycle rotary engine85US 7,753,036 B2United Technologies Corporation · 2010