F05B 2220/50
Application: for auxiliary power units
Official title: for auxiliary power units (APU's)
F05B2220/50 (Application: for auxiliary power units) appears on 130 US grants and 50 published applications in this corpus.
Search patents in F05B- Granted patents
- 130
- Published applications
- 50
- Assignees
- 49
- Inventors
- 230
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 11 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 3 |
| 2002 | 4 | 6 |
| 2003 | 9 | 3 |
| 2004 | 2 | 3 |
| 2005 | 1 | 3 |
| 2006 | 4 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 1 | 4 |
| 2013 | 0 | 2 |
| 2014 | 2 | 1 |
| 2015 | 3 | 1 |
| 2016 | 1 | 2 |
| 2017 | 1 | 0 |
| 2018 | 2 | 2 |
| 2019 | 2 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 6 |
| 2022 | 4 | 4 |
| 2023 | 1 | 1 |
| 2024 | 4 | 1 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system for power generation11 Nov 2025US 12,467,340 B2Cameron Internation Corporation
- Air cycle machines, air cycle machine systems, and methods of controlling air flow in air cycle machines8 Apr 2025US 12,269,602 B2Hamilton Sundstrand Corporation
- Auxiliary power unit system of an aircraft17 Dec 2024US 12,168,522 B2Airbus Operations S.L.U.
- Transmission device for hybrid aircraft8 Oct 2024US 12,110,128 B2Safran Helicopter Engines
- Electricity generating module and electricity generating method9 Jul 2024US 12,034,384 B2Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
- Apparatus to produce electric energy for water vehicle and method to use this apparatus12 Mar 2026US 2026/0070644 A1Jptuf Oy
- Method and sytem for power generation22 May 2025US 2025/0163898 A1Cameron International Corporation
- Improved transmission device for hybrid aircraft18 Jul 2024US 2024/0239509 A1Safran Helicopter Engines
- Auxiliary power unit system of an aircraft30 Nov 2023US 2023/0382553 A1Airbus Operations S.L.U.
- Back-up power supply for wind turbines3 Nov 2022US 2022/0349382 A1General Electric Renovables Espana, S.L.
Most cited
By later US patents
- Regenerative condensing cycle163US 5,461,882 AUnited Technologies Corporation · 1995
- Multifunction power system for an aircraft160US 4,684,081 ALockheed Corporation · 1987
- Starter/generator system having multivoltage generation capability130US 5,512,811 ASundstrand Corporation · 1996
- Aircraft gas turbine engine bleed air energy recovery apparatus119US 5,137,230 AGeneral Electric Company · 1992
- Aircraft electrical system providing emergency power and electric starting of propulsion engines117US 5,899,411 ASundstrand Corporation · 1999