F01C 11/00
Combinations of two or more machines or engines, each being of rotary-piston
Official title: Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type (F01C13/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H)
F01C11/00 (Combinations of two or more machines or engines, each being of rotary-piston) appears on 518 US grants and 426 published applications in this corpus.
Search patents in F01C- Granted patents
- 518
- Published applications
- 426
- Assignees
- 175
- Inventors
- 695
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 11 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 13 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 14 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 6 |
| 2002 | 12 | 6 |
| 2003 | 18 | 16 |
| 2004 | 12 | 19 |
| 2005 | 15 | 27 |
| 2006 | 17 | 33 |
| 2007 | 9 | 25 |
| 2008 | 10 | 21 |
| 2009 | 11 | 30 |
| 2010 | 21 | 32 |
| 2011 | 19 | 21 |
| 2012 | 20 | 10 |
| 2013 | 11 | 20 |
| 2014 | 20 | 19 |
| 2015 | 18 | 19 |
| 2016 | 11 | 22 |
| 2017 | 17 | 25 |
| 2018 | 19 | 17 |
| 2019 | 16 | 8 |
| 2020 | 22 | 18 |
| 2021 | 15 | 9 |
| 2022 | 8 | 5 |
| 2023 | 6 | 5 |
| 2024 | 6 | 6 |
| 2025 | 6 | 4 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tangential internal combustion engine19 May 2026US 12,631,137 B2Fnf Innovation Sh.P.K.
- Method and apparatus for a rotary thermodynamic cycle with substantially isobaric fluid admission15 Jul 2025US 12,359,641 B2Fetu Limited
- Integrated internal continuous combustion rotary engine27 May 2025US 12,312,960 B1
- Dual gerotor apparatus, a powertrain assembley and an electrified vehicle27 May 2025US 12,313,067 B2Valeo Powertrain (Nanjing) Co., Ltd.
- Rotary engine, parts thereof, and methods8 Apr 2025US 12,270,331 B2Astron Aerospace LLC
- Rotary Vane Internal Combustion Engine17 Sep 2026US 2026/0275869 A1
- Rotor-stator assembly for a rotary engine, compressor or pump, a rotary engine and a lifting unit and device25 Jun 2026US 2026/0176971 A1
- Tangential internal combustion engine26 Feb 2026US 2026/0055723 A1Fnf Innovation Sh.P.K.
- Rotary engine, parts thereof, and methods18 Dec 2025US 2025/0382912 A1Astron Aerospace LLC
- Rotary engine, parts thereof, and methods5 Jun 2025US 2025/0179956 A1Astron Aerospace LLC
Most cited
By later US patents
- Sliding-blade rotary air-heat engine with isothermal compression of air99US 5,839,270 A1998
- Compound cycle rotary engine85US 7,753,036 B2United Technologies Corporation · 2010
- Method and apparatus for transferring heat energy from engine housing to expansion fluid employed in continuous combustion, pinned vane type, integrated rotary compressor-expander engine system67US 5,522,356 ASpread Spectrum · 1996
- High efficiency positive displacement thermodynamic system67US 8,424,284 B22013
- Scroll-type two stage positive fluid displacement apparatus56US 4,157,234 AIngersoll-Rand Company · 1979