H01F 38/16
Cascade transformers
Official title: Cascade transformers, e.g. for use with extra high tension
H01F38/16 (Cascade transformers) appears on 20 US grants and 15 published applications in this corpus.
Search patents in H01F- Granted patents
- 20
- Published applications
- 15
- Assignees
- 19
- Inventors
- 43
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 2 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 2 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 2 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Energy management system19 May 2026US 12,633,813 B2Enphase Energy, Inc.
- Transformer assembly with medium frequency transformers25 Oct 2022US 11,480,602 B2ABB Schweiz AG
- Cascaded filament transformer within a resistive shroud2 Jul 2019US 10,342,107 B2Kimtron, Inc.
- Current transformer system with sensor CT and generator CT separately arranged in parallel in electric power line, and integrated system for controlling same in wireless communications network29 Jan 2019US 10,192,678 B2Ferrarispower Co., Ltd.
- Common mode noise restrainer applicable to ethernet17 Jul 2018US 10,026,544 B2Realtek Semiconductor Corp.
- Energy management system22 Aug 2024US 2024/0283347 A1Enphase Energy, Inc.
- Power Conversion Device25 Jan 2024US 2024/0030824 A1Hitachi, Ltd.
- Transformer Assembly With Medium Frequency Transformers21 Jan 2021US 2021/0018554 A1ABB Schweiz AG
- Automatic device and method for compensating reactive component losses in ac networks27 Aug 2020US 2020/0274358 A1Zakrytoe Aktsionernoe Obschestvo "Ec-Leasing"
- Power supply platform supporting integrated transformer and disconnect25 Jun 2020US 2020/0203054 A1
Most cited
By later US patents
- Modular transformer arrangement for use with multi-level power converter101US 6,340,851 B12002
- Transformer for switched mode power supplies and similar applications66US 6,137,392 A2000
- High voltage isolating transformer module28US 5,594,402 AInternational Power Group, Inc. · 1997
- Power factor correction rectifier having independent inductive components13US 7,265,650 B2Delta Electronics, Inc. · 2007
- Current transformer system with sensor CT and generator CT separately arranged in parallel in electric power line, and integrated system for controlling same in wireless communications network12US 10,192,678 B2Ferrarispower Co., Ltd. · 2019