H03K 17/28
Modifications for introducing a time delay before switching
Official title: Modifications for introducing a time delay before switching (modifications to provide a choice of time-intervals for executing more than one switching action H03K17/296)
H03K17/28 (Modifications for introducing a time delay before switching) appears on 639 US grants and 528 published applications in this corpus.
Search patents in H03K- Granted patents
- 639
- Published applications
- 528
- Assignees
- 355
- Inventors
- 1,234
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 22 | 0 |
| 1978 | 11 | 0 |
| 1979 | 14 | 0 |
| 1980 | 8 | 0 |
| 1981 | 11 | 0 |
| 1982 | 7 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 10 | 0 |
| 1986 | 4 | 0 |
| 1987 | 10 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 9 | 0 |
| 1997 | 3 | 0 |
| 1998 | 7 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 3 |
| 2002 | 3 | 6 |
| 2003 | 6 | 5 |
| 2004 | 5 | 0 |
| 2005 | 0 | 6 |
| 2006 | 5 | 3 |
| 2007 | 3 | 12 |
| 2008 | 9 | 30 |
| 2009 | 11 | 9 |
| 2010 | 16 | 19 |
| 2011 | 12 | 10 |
| 2012 | 11 | 11 |
| 2013 | 19 | 12 |
| 2014 | 12 | 16 |
| 2015 | 11 | 20 |
| 2016 | 24 | 19 |
| 2017 | 30 | 34 |
| 2018 | 29 | 42 |
| 2019 | 43 | 27 |
| 2020 | 30 | 35 |
| 2021 | 29 | 23 |
| 2022 | 20 | 26 |
| 2023 | 29 | 28 |
| 2024 | 26 | 66 |
| 2025 | 44 | 34 |
| 2026 | 28 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Driving circuit, voltage converter and control method thereof6 Oct 2026US 12,756,314 B2PowerX Semiconductor Corporation
- Switch control device and battery pack including the same6 Oct 2026US 12,756,389 B2Samsung SDI.Co., Ltd.
- Providing timing signals to gate drivers of a converter18 Aug 2026US 12,712,436 B2Microchip Technology Incorporated
- Delay buffer unit and operating method thereof, computing device and operating method thereof4 Aug 2026US 12,700,868 B2Tsinghua University
- Paralleling power switches28 Jul 2026US 12,695,450 B2Power Integrations, Inc.
- Single-ended dc-to-dc converter24 Sep 2026US 2026/0291366 A1
- Electronic circuitry, power converter, and driving method24 Sep 2026US 2026/0291371 A1Kabushiki Kaisha Toshiba
- Active gate control device24 Sep 2026US 2026/0291490 A1Kabushiki Kaisha Toshiba
- Switch control apparatus including switch control circuit and power supply apparatus including switch control circuit24 Sep 2026US 2026/0291491 A1Samsung SDI.Co., Ltd.
- Hybrid switching device10 Sep 2026US 2026/0269601 A1ABB Schweiz AG
Most cited
By later US patents
- Time delay switch1,477US 5,473,204 A1995
- Integrated circuit incorporating low voltage and high voltage semiconductor devices168US 4,412,142 AGeneral Electric Company · 1983
- Method and apparatus for multiplexing devices having long thermal time constants138US 5,583,462 AUnifet Incorporated · 1996
- Automatic intermittent vapor dispenser126US 4,166,087 ACline-Buckner, Inc. · 1979
- AC Solid-state circuit breaker70US 4,245,184 AWestinghouse Electric Corp. · 1981