F01D 13/00
Combinations of two or more machines or engines
Official title: Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H)
F01D13/00 (Combinations of two or more machines or engines) appears on 189 US grants and 203 published applications in this corpus.
Search patents in F01D- Granted patents
- 189
- Published applications
- 203
- Assignees
- 91
- Inventors
- 426
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 2 | 3 |
| 2005 | 1 | 1 |
| 2006 | 3 | 0 |
| 2007 | 1 | 3 |
| 2008 | 0 | 5 |
| 2009 | 3 | 2 |
| 2010 | 3 | 6 |
| 2011 | 4 | 1 |
| 2012 | 4 | 11 |
| 2013 | 1 | 7 |
| 2014 | 4 | 7 |
| 2015 | 7 | 19 |
| 2016 | 5 | 24 |
| 2017 | 12 | 11 |
| 2018 | 11 | 25 |
| 2019 | 20 | 9 |
| 2020 | 20 | 28 |
| 2021 | 18 | 10 |
| 2022 | 13 | 9 |
| 2023 | 13 | 10 |
| 2024 | 11 | 8 |
| 2025 | 5 | 3 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electrical assembly for a hybrid-electric aircraft propulsion system9 Jun 2026US 12,649,583 B1Rtx Corporation
- Steam turbine bypass for increased water heat absorption capacity steam injected turbine engine10 Feb 2026US 12,546,250 B2Rtx Corporation
- Apparatus and method for fluid manipulation10 Feb 2026US 12,546,344 B2
- Aircraft engine with exhaust having removable deflector23 Sep 2025US 12,420,941 B2Pratt & Whitney Canada Corp.
- Flow control device for axial flow turbomachines in series23 Sep 2025US 12,421,858 B1The United States of America as represented by the Secretary of the Navy
- Apparatus and method for fluid manipulation9 Jul 2026US 2026/0194082 A1
- Engine system for an aircraft11 Dec 2025US 2025/0376951 A1Ge Aviation Czech S.R.O.
- Aircraft propulsion system and method for operating same28 Aug 2025US 2025/0269971 A1Pratt & Whitney Canada Corp.
- Ultra-efficient bladeless turbomachinery5 Jun 2025US 2025/0179919 A1
- Power generation system, control device, and control method5 Dec 2024US 2024/0401501 A1
Most cited
By later US patents
- Turbine installation having a connectable auxiliary group115US 7,614,239 B2ALSTOM Technology Ltd · 2009
- System, method and apparatus for lean combustion with plasma from an electrical arc107US 8,074,439 B2Foret Plasma Labs, LLC · 2011
- Hydrogen-rich fuel, closed-loop cooled, and reheat enhanced gas turbine powerplants106US 5,590,518 ACalifornia Energy Commission · 1997
- Aircraft combination engines thermal management system93US 7,836,680 B2United Technologies Corporation · 2010
- Power plant start-up method and method of venting the power plant75US 8,266,883 B2General Electric Company · 2012