F04D 29/70
Suction grids
Official title: Suction grids; Strainers; Dust separation; Cleaning
F04D29/70 (Suction grids) appears on 1,621 US grants and 1,885 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,621
- Published applications
- 1,885
- Assignees
- 898
- Inventors
- 3,875
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 11 | 0 |
| 1991 | 12 | 0 |
| 1992 | 11 | 0 |
| 1993 | 13 | 0 |
| 1994 | 14 | 0 |
| 1995 | 15 | 0 |
| 1996 | 11 | 0 |
| 1997 | 7 | 0 |
| 1998 | 12 | 0 |
| 1999 | 14 | 0 |
| 2000 | 23 | 0 |
| 2001 | 27 | 5 |
| 2002 | 23 | 21 |
| 2003 | 32 | 26 |
| 2004 | 27 | 32 |
| 2005 | 5 | 20 |
| 2006 | 19 | 37 |
| 2007 | 16 | 37 |
| 2008 | 14 | 60 |
| 2009 | 18 | 51 |
| 2010 | 24 | 54 |
| 2011 | 35 | 46 |
| 2012 | 50 | 45 |
| 2013 | 30 | 69 |
| 2014 | 46 | 71 |
| 2015 | 48 | 86 |
| 2016 | 38 | 81 |
| 2017 | 57 | 116 |
| 2018 | 71 | 129 |
| 2019 | 117 | 113 |
| 2020 | 114 | 97 |
| 2021 | 93 | 124 |
| 2022 | 110 | 129 |
| 2023 | 98 | 116 |
| 2024 | 141 | 119 |
| 2025 | 98 | 122 |
| 2026 | 63 | 79 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Handheld camera fan6 Oct 2026US 12,753,778 B1Shenzhen Xinyifang International Trade Co., Ltd.
- Blowing device and blowing device operating method29 Sep 2026US 12,747,738 B2Samsung Electronics Co., Ltd.
- Water well submersible pump filter29 Sep 2026US 12,747,741 B2FES Labs, LLC
- Submersible pump housing22 Sep 2026US 12,742,462 B1Turtle Pump Company LLC
- Handheld blower15 Sep 2026US 12,733,600 B2Milwaukee Electric Tool Corporation
- Evaporator for ambient water bodies, and related system and method8 Oct 2026US 2026/0306964 A1Resource West, Inc.
- Systems and methods of prediction and management of scaling on components8 Oct 2026US 2026/0309156 A1Schlumberger Technology Corporation
- Scalable multi-stage magnetic levitation molten salt pump1 Oct 2026US 2026/0298245 A1Lanzhou University of Technology
- Fan assembly24 Sep 2026US 2026/0286976 A1Milwaukee Electric Tool Corporation
- Fan and fan module24 Sep 2026US 2026/0286982 A1Lenovo Global Technology (Taiwan) Limited.
Most cited
By later US patents
- Forced ventilation filtration device185US 5,022,900 AEagle, Military Gear Overseas Ltd. · 1991
- Molten metal pump with filter134US 4,940,384 AThe Carborundum Company · 1990
- Gas turbine engine variable bleed pivotal flow splitter132US 5,279,109 AGeneral Electric Company · 1994
- Pump for pumping molten metal having cleaning and repair features128US 5,842,832 A1998
- Molten metal pump with filter121US 5,078,572 AThe Carborundum Company · 1992