F04D 19/024
With contrarotating parts
Official title: {with contrarotating parts}
F04D19/024 (With contrarotating parts) appears on 125 US grants and 146 published applications in this corpus.
Search patents in F04D- Granted patents
- 125
- Published applications
- 146
- Assignees
- 79
- Inventors
- 305
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 3 |
| 2004 | 1 | 0 |
| 2005 | 1 | 4 |
| 2006 | 2 | 3 |
| 2007 | 1 | 2 |
| 2008 | 2 | 3 |
| 2009 | 0 | 4 |
| 2010 | 3 | 4 |
| 2011 | 1 | 9 |
| 2012 | 3 | 3 |
| 2013 | 5 | 4 |
| 2014 | 4 | 7 |
| 2015 | 5 | 5 |
| 2016 | 6 | 10 |
| 2017 | 4 | 3 |
| 2018 | 5 | 8 |
| 2019 | 6 | 12 |
| 2020 | 8 | 15 |
| 2021 | 9 | 11 |
| 2022 | 19 | 13 |
| 2023 | 7 | 7 |
| 2024 | 10 | 5 |
| 2025 | 8 | 8 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Blower15 Sep 2026US 12,736,063 B2Nidec Corporation
- Thrust-balancing contra-rotating system2 Jun 2026US 12,644,459 B2OneSubsea IP UK Limited
- Counter-rotating fan assembly17 Mar 2026US 12,577,955 B2Robert Bosch GmbH
- Dual-motor coaxial different-direction dual-propeller structure of electric paramotor30 Dec 2025US 12,510,084 B1
- Method for efficient part load compressor operation4 Nov 2025US 12,460,651 B2Next Gen Compression LLC
- Blower11 Jun 2026US 2026/0160257 A1Nanjing Chervon Industry Co., Ltd.
- Blower2 Apr 2026US 2026/0092608 A1Nidec Corporation
- Impeller and blowing apparatus including the same5 Mar 2026US 2026/0063130 A1Nidec Corporation
- Efficient gas turbine engine installation and operation25 Dec 2025US 2025/0389191 A1ROLLS-ROYCE plc
- Fan bank enabling reduced fan noise and vibration2 Oct 2025US 2025/0305519 A1Asia Vital Components Co., Ltd.
Most cited
By later US patents
- Counter rotating aircraft gas turbine engine with high overall pressure ratio compressor248US 6,732,502 B2General Electric Company · 2004
- Turbojet with contrarotating wheels108US 4,463,553 AOffice National D’Etudes Et De Recherches AéRospatiales · 1984
- Axial flow fan having counter-rotating dual impeller blade arrangement98US 6,565,334 B12003
- Counterrotating axial blower47US 7,156,611 B2Sanyo Denki Co., Ltd. · 2007
- Aircraft engine with separate auxiliary rotor and fan rotor44US 7,765,786 B2MTU Aero Engines AG · 2010