F04D 29/058
Magnetic
Official title: magnetic; electromagnetic
F04D29/058 (Magnetic) appears on 323 US grants and 393 published applications in this corpus.
Search patents in F04D- Granted patents
- 323
- Published applications
- 393
- Assignees
- 159
- Inventors
- 709
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 1 |
| 2002 | 11 | 8 |
| 2003 | 10 | 7 |
| 2004 | 4 | 3 |
| 2005 | 2 | 7 |
| 2006 | 3 | 3 |
| 2007 | 4 | 10 |
| 2008 | 2 | 15 |
| 2009 | 0 | 6 |
| 2010 | 10 | 9 |
| 2011 | 8 | 11 |
| 2012 | 8 | 14 |
| 2013 | 3 | 15 |
| 2014 | 10 | 29 |
| 2015 | 6 | 24 |
| 2016 | 12 | 21 |
| 2017 | 23 | 22 |
| 2018 | 20 | 31 |
| 2019 | 17 | 21 |
| 2020 | 37 | 29 |
| 2021 | 19 | 26 |
| 2022 | 26 | 21 |
| 2023 | 19 | 10 |
| 2024 | 16 | 16 |
| 2025 | 11 | 17 |
| 2026 | 11 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fan6 Oct 2026US 12,753,768 B2Levitronix LLC
- Magnetic bearing and compressor22 Sep 2026US 12,742,475 B2Gree Electric Appliances, Inc. of Zhuhai
- Variable geometry diffuser having extended travel and control method thereof25 Aug 2026US 12,716,427 B2Tyco Fire & Security GmbH
- Turbo compressor and turbo chiller comprising same11 Aug 2026US 12,704,133 B2Mitsubishi Heavy Industries Thermal Systems, Ltd.
- Magnetic levitation motor sealing-cooling apparatus for refrigeration system and method therefor11 Aug 2026US 12,706,510 B2Shanghai Marine Diesel Engine Research Institute
- A vacuum pump and a permanent magnetic bearing assembly for a vacuum pump24 Sep 2026US 2026/0286969 A1
- Magnetic assembly and vacuum pump17 Sep 2026US 2026/0275991 A1Leybold Aktiengesellschaft
- Centrifugal compressor10 Sep 2026US 2026/0266311 A1Daikin Industries, Ltd.
- Magnetic bearing hub and vacuum pump20 Aug 2026US 2026/0243264 A1
- Magnetic levitation propeller type of a gas injector and a photoresist removing processing chamber with the same20 Aug 2026US 2026/0243265 A1VM Inc.
Most cited
By later US patents
- Compressor149US 5,857,348 AMultistack International Limited · 1999
- Centrifugal compressor110US 4,523,896 ACreusot-Loire · 1985
- Multi-stage compressor having first and second passages for cooling a motor during load and non-load operation61US 5,980,218 AHitachi, Ltd. · 1999
- Fixed gain electromagnetic actuator and electromagnetic bearing incorporating same57US 5,319,273 ASatCon Technology Corporation · 1994
- Electrically driven, circumferentially supported fan56US 4,962,734 APACCAR Inc · 1990