H01F 30/08
Without magnetic core
Official title: without magnetic core
H01F30/08 (Without magnetic core) appears on 36 US grants and 35 published applications in this corpus.
Search patents in H01F- Granted patents
- 36
- Published applications
- 35
- Assignees
- 32
- Inventors
- 95
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 3 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 1 | 2 |
| 2012 | 3 | 2 |
| 2013 | 1 | 0 |
| 2014 | 1 | 3 |
| 2015 | 2 | 2 |
| 2016 | 2 | 3 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 2 |
| 2020 | 3 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 2 | 4 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Vibration driving device for a strong magnetic-field environment4 Nov 2025US 12,463,560 B2Canon Kabushiki Kaisha
- Gate driver coreless transformers for magnetic resonance imaging power electronics21 Jan 2025US 12,206,394 B2GE Precision Healthcare LLC
- Transformer module and power module3 Dec 2024US 12,159,749 B2Delta Electronics (Shanghai) Co., Ltd.
- Transformer module and power module1 Oct 2024US 12,106,895 B2Delta Electronics (Shanghai) Co., Ltd.
- Transformer module and power module12 Dec 2023US 11,842,847 B2Delta Electronics (Shanghai) Co., Ltd.
- Compact high-voltage pulse transformer and method of manufacturing same30 May 2024US 2024/0177924 A1
- Transformer module and power module15 Feb 2024US 2024/0055181 A1Delta Electronics (Shanghai) Co., Ltd.
- Transformer module and power module15 Feb 2024US 2024/0055182 A1Delta Electronics (Shanghai) Co., Ltd.
- Transformer module and power module8 Feb 2024US 2024/0047135 A1Delta Electronics (Shanghai) Co., Ltd.
- Gate driver coreless transformers for magnetic resonance imaging power electronics30 Nov 2023US 2023/0387905 A1GE Precision Healthcare LLC
Most cited
By later US patents
- High-power, low-loss high-frequency electrical coil188US 3,946,349 AThe United States of America as represented by the Secretary of the Air Force · 1976
- Air coil and method of making the same84US 5,592,150 ATexas Instruments Incorporated · 1997
- Air Coil a security badge and a transponder83US 5,867,100 ATexas Instruments Incorporated · 1999
- Power supply81US 8,223,508 B2Access Business Group International LLC · 2012
- High voltage pulse generator55US 6,355,992 B1Utron Inc. · 2002