F04D 29/422
Discharge tongues
Official title: {Discharge tongues (F04D17/04 takes precedence)}
F04D29/422 (Discharge tongues) appears on 240 US grants and 244 published applications in this corpus.
Search patents in F04D- Granted patents
- 240
- Published applications
- 244
- Assignees
- 165
- Inventors
- 554
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 2 |
| 2002 | 4 | 3 |
| 2003 | 2 | 5 |
| 2004 | 3 | 4 |
| 2005 | 5 | 5 |
| 2006 | 1 | 7 |
| 2007 | 2 | 4 |
| 2008 | 1 | 7 |
| 2009 | 5 | 7 |
| 2010 | 3 | 14 |
| 2011 | 6 | 10 |
| 2012 | 7 | 7 |
| 2013 | 7 | 7 |
| 2014 | 8 | 12 |
| 2015 | 10 | 14 |
| 2016 | 9 | 19 |
| 2017 | 10 | 7 |
| 2018 | 16 | 11 |
| 2019 | 16 | 15 |
| 2020 | 14 | 17 |
| 2021 | 14 | 18 |
| 2022 | 18 | 12 |
| 2023 | 13 | 14 |
| 2024 | 13 | 11 |
| 2025 | 9 | 7 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tow and ride debris blowers29 Sep 2026US 12,747,737 B2
- Aircraft gas turbine engine impeller with a trailing edge that is non-linear or angled or irregularly-shaped25 Aug 2026US 12,716,424 B2Pratt & Whitney Canada Corp.
- Rotary inflating and deflating pump30 Jun 2026US 12,669,132 B2Boluo Futian Fumao plastic hardware products Co., Ltd.
- Ventilation fan19 May 2026US 12,631,195 B1Broan-NuTone LLC
- Ventilation device24 Feb 2026US 12,560,370 B2LG Electronics Inc.
- Fan, air conditioning outdoor unit, and air conditioning apparatus16 Jul 2026US 2026/0201901 A1Daikin Industries, Ltd.
- Asymmetric impeller and multi-blade centrifugal fan21 May 2026US 2026/0139691 A1China Academy of Aerospace Aerodynamics Technology
- Diagonal impeller, fan and ventilation device7 May 2026US 2026/0126051 A1Guangdong Welling Motor Manufacturing Co., Ltd.
- Rotary inflating and deflating pump5 Mar 2026US 2026/0063140 A1Boluo Futian Fumao plastic hardware products Co., Ltd.
- Aircraft gas turbine engine impeller with a trailing edge that is non-linear or angled or irregularly-shaped5 Feb 2026US 2026/0036133 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- High speed whirlpool pump121US 5,156,535 AITT Corporation · 1992
- Blower housing construction69US 4,799,287 ABelanger, Inc. · 1989
- Room air cleaner40US 6,616,722 B1HMI Industries, Inc. · 2003
- Furnace blower having sound attenuation36US 5,536,140 AAmetek, Inc. · 1996
- Air conditioning apparatus for use in automobile33US 4,958,504 AMatsushita Electric Industrial Co., Ltd. · 1990