F01D 13/003
Combinations of two or more machines or engines: with at least two
Official title: {with at least two independent shafts, i.e. cross-compound}
F01D13/003 (Combinations of two or more machines or engines: with at least two) appears on 62 US grants and 78 published applications in this corpus.
Search patents in F01D- Granted patents
- 62
- Published applications
- 78
- Assignees
- 37
- Inventors
- 160
- Latest grant
- 24 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 1 | 3 |
| 2011 | 2 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 3 |
| 2014 | 1 | 3 |
| 2015 | 1 | 9 |
| 2016 | 1 | 9 |
| 2017 | 6 | 4 |
| 2018 | 2 | 10 |
| 2019 | 7 | 4 |
| 2020 | 8 | 13 |
| 2021 | 9 | 4 |
| 2022 | 6 | 4 |
| 2023 | 4 | 4 |
| 2024 | 5 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Turboshaft gas turbine engine24 Sep 2024US 12,098,644 B2Pratt & Whitney Canada Corp.
- Method for coupling a hydroelectric power plant to the grid comprising at least two hydroelectric units17 Sep 2024US 12,092,067 B2
- Multi-engine system and method5 Mar 2024US 11,920,479 B2Pratt & Whitney Canada Corp.
- Multi-engine system and power transfer between engines thereof20 Feb 2024US 11,905,888 B2Pratt & Whitney Canada Corp.
- Gas turbine engine and method of operation9 Jan 2024US 11,867,126 B2Pratt & Whitney Canada Corp.
- Power generation system, control device, and control method5 Dec 2024US 2024/0401501 A1
- Gas turbine engine and method of operation28 Mar 2024US 2024/0102421 A1Pratt & Whitney Canada Corp.
- Turboshaft gas turbine engine9 Mar 2023US 2023/0075494 A1Pratt & Whitney Canada Corp.
- Multi-engine system and power transfer between engines thereof2 Feb 2023US 2023/0034946 A1Pratt & Whitney Canada Corp.
- Gas turbine engine and method of operation19 Jan 2023US 2023/0016164 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Variable cycle turbine engine65US 8,943,796 B2United Technologies Corporation · 2015
- Gas turbine engine with dual fans driven about a central core axis41US 8,015,796 B2United Technologies Corporation · 2011
- Turbofan jet engine with low pressure shaft passing outside of core engine27US 9,828,911 B2Rolls-Royce Deutschland Ltd & Co KG · 2017
- Plural engine power producing system22US 5,239,830 AAvco Corporation · 1993
- Architecture for a propulsion system of a helicopter including a hybrid turboshaft engine and a system for reactivating said hybrid turboshaft engine20US 11,161,603 B2Safran Electrical & Power · 2021