H03K 17/691
Using transformer coupling
Official title: using transformer coupling
H03K17/691 (Using transformer coupling) appears on 484 US grants and 431 published applications in this corpus.
Search patents in H03K- Granted patents
- 484
- Published applications
- 431
- Assignees
- 263
- Inventors
- 856
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 10 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 9 | 0 |
| 1998 | 5 | 0 |
| 1999 | 8 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 3 |
| 2002 | 5 | 1 |
| 2003 | 1 | 4 |
| 2004 | 5 | 4 |
| 2005 | 7 | 8 |
| 2006 | 4 | 3 |
| 2007 | 4 | 12 |
| 2008 | 8 | 8 |
| 2009 | 10 | 17 |
| 2010 | 12 | 11 |
| 2011 | 11 | 6 |
| 2012 | 2 | 16 |
| 2013 | 15 | 15 |
| 2014 | 19 | 20 |
| 2015 | 11 | 29 |
| 2016 | 22 | 15 |
| 2017 | 33 | 24 |
| 2018 | 30 | 31 |
| 2019 | 32 | 30 |
| 2020 | 31 | 29 |
| 2021 | 24 | 17 |
| 2022 | 17 | 13 |
| 2023 | 17 | 35 |
| 2024 | 15 | 29 |
| 2025 | 30 | 26 |
| 2026 | 16 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pulse transmission circuit, signal transmission device, electronic device, and vehicle15 Sep 2026US 12,738,938 B2Rohm Co., Ltd.
- Drive circuit18 Aug 2026US 12,712,434 B2Solaredge Technologies Ltd.
- Signal transmission circuit and power conversion apparatus11 Aug 2026US 12,706,524 B2Mitsubishi Electric Corporation
- Pulse drive circuit and signal transmission device11 Aug 2026US 12,706,598 B2Rohm Co., Ltd.
- Signal transmission device and electronic device14 Jul 2026US 12,683,606 B2Rohm Co., Ltd.
- Semiconductor device, electronic apparatus, and vehicle17 Sep 2026US 2026/0280560 A1Rohm Co., Ltd.
- Switch and drive apparatus27 Aug 2026US 2026/0254450 A1Huawei Digital Power Technologies Co., Ltd.
- Semiconductor device, signal transmission device, electronic device, and vehicle27 Aug 2026US 2026/0254451 A1Rohm Co., Ltd.
- Semiconductor device, electronic device, and vehicle13 Aug 2026US 2026/0238205 A1Rohm Co., Ltd.
- Semiconductor device, electronic device, and vehicle13 Aug 2026US 2026/0238206 A1Rohm Co., Ltd.
Most cited
By later US patents
- Circuit for driving a voltage-controlled semiconductor switch189US 5,404,059 AABB Patent GmbH · 1995
- Power driver circuit178US 5,504,449 AHarris Corporation · 1996
- Transformer coupled FET drive circuit170US 5,963,078 APeco II, Inc. · 1999
- Intelligent, isolated half-bridge power module157US 5,596,466 AIXYS Corporation · 1997
- Solar photovoltaic module safety shutdown system143US 8,859,884 B2Helios Focus LLC · 2014