H01F 27/326
Specifically adapted for discharge lamp ballasts
Official title: {specifically adapted for discharge lamp ballasts}
H01F27/326 (Specifically adapted for discharge lamp ballasts) appears on 57 US grants and 77 published applications in this corpus.
Search patents in H01F- Granted patents
- 57
- Published applications
- 77
- Assignees
- 52
- Inventors
- 139
- Latest grant
- 2 Aug 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2002 | 1 | 3 |
| 2003 | 0 | 0 |
| 2004 | 1 | 4 |
| 2005 | 3 | 4 |
| 2006 | 3 | 6 |
| 2007 | 5 | 21 |
| 2008 | 9 | 10 |
| 2009 | 6 | 10 |
| 2010 | 15 | 9 |
| 2011 | 3 | 5 |
| 2012 | 6 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
By publication year.
Recent patents
- Planar transformer and DC-DC converter2 Aug 2022US 11,404,202 B2Marelli Corporation
- Resonant high current density transformer20 Feb 2018US 9,899,144 B2
- Multifunction magnetic device with multiple cores and coils22 Mar 2016US 9,295,145 B1Universal Lighting Technologies, Inc.
- Coil device29 Jul 2014US 8,791,786 B2TDK Corporation
- Transformer and liquid crystal display apparatus having the same1 Jul 2014US 8,766,755 B2Samsung Display Co., Ltd.
- Planar Transformer and DC-DC Converter2 Jul 2020US 2020/0211765 A1Marelli Corporation
- Resonant high current density transformer20 Apr 2017US 2017/0110241 A1Yujing Technology Co., Ltd.
- Power transformer2 Jan 2014US 2014/0002230 A1Wurth Electronics Midcom, Inc.
- Coil device20 Jun 2013US 2013/0154787 A1TDK Corporation
- Transformer including high voltage pole and electrical connection to load16 Feb 2012US 2012/0038447 A1Ampower Technology Co., Ltd.
Most cited
By later US patents
- Transformer having adjustable leakage inductance14US 7,236,077 B1Delta Electronics, Inc. · 2007
- Transformer and core set thereof13US 7,528,694 B2Delta Electronics, Inc. · 2009
- Transformer12US 6,937,129 B2Darfon Electronics Corp. · 2005
- Inverter transformer and discharge tube drive circuit using the same12US 7,768,374 B2Sumida Corporation · 2010
- Transformer for igniter10US 6,856,227 B2Mitsubishi Denki Kabushiki Kaisha · 2005