H02H 9/001
Limiting speed of change of electric quantities
Official title: {limiting speed of change of electric quantities, e.g. soft switching on or off (progressive control of electronic switches for eliminating interferences H03K17/16)}
H02H9/001 (Limiting speed of change of electric quantities) appears on 964 US grants and 875 published applications in this corpus.
Search patents in H02H- Granted patents
- 964
- Published applications
- 875
- Assignees
- 575
- Inventors
- 2,116
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 9 | 0 |
| 1993 | 11 | 0 |
| 1994 | 8 | 0 |
| 1995 | 15 | 0 |
| 1996 | 16 | 0 |
| 1997 | 14 | 0 |
| 1998 | 21 | 0 |
| 1999 | 33 | 0 |
| 2000 | 16 | 0 |
| 2001 | 13 | 6 |
| 2002 | 19 | 18 |
| 2003 | 13 | 18 |
| 2004 | 18 | 14 |
| 2005 | 14 | 16 |
| 2006 | 11 | 23 |
| 2007 | 10 | 21 |
| 2008 | 14 | 13 |
| 2009 | 15 | 29 |
| 2010 | 21 | 33 |
| 2011 | 27 | 26 |
| 2012 | 22 | 43 |
| 2013 | 35 | 35 |
| 2014 | 33 | 49 |
| 2015 | 30 | 46 |
| 2016 | 33 | 37 |
| 2017 | 51 | 47 |
| 2018 | 48 | 46 |
| 2019 | 50 | 52 |
| 2020 | 42 | 61 |
| 2021 | 51 | 45 |
| 2022 | 54 | 45 |
| 2023 | 26 | 31 |
| 2024 | 48 | 39 |
| 2025 | 36 | 52 |
| 2026 | 27 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power switching system6 Oct 2026US 12,756,192 B2Delta Electronics, Inc.
- Inrush current limiting circuit22 Sep 2026US 12,744,376 B2ABB Schweiz AG
- Techniques for using an energy storage system as soft starter for large inductive devices25 Aug 2026US 12,719,263 B2Caterpillar Inc.
- Inrush current protection circuit for solid state lighting fixtures25 Aug 2026US 12,720,655 B2Hubbell Incorporated
- Fault-responsive power system and method using asynchronous load current switching11 Aug 2026US 12,706,453 B2Equinox Power Innovations Inc.
- Rectifier with inrush protection bypass passing current in one direction only and method for starting up power supply to a rectifier27 Aug 2026US 2026/0254228 A1
- Methods and apparatus to improve performance of power path protection devices20 Aug 2026US 2026/0246260 A1Texas Instruments Incorporated
- Inrush current suppression circuit6 Aug 2026US 2026/0229880 A1Anpec Electronics Corporation
- In-vehicle cutoff current supply device30 Jul 2026US 2026/0221750 A1Autonetworks Technologies, Ltd.
- Power precharge system for multiple channels30 Jul 2026US 2026/0221784 A1Eaton Intelligent Power Limited
Most cited
By later US patents
- Automatic computer card insertion and removal algorithm201US 5,555,510 AIntel Corporation · 1996
- Hot insertion power arrangement157US 5,726,506 AAlantec Corporation · 1998
- Hot-plugging circuit for the interconnection of cards to boards151US 5,272,584 AInternational Business Machines Corporation · 1993
- Sequential connector133US 5,268,592 AInternational Business Machines Corporation · 1993
- Soft-start pump control system110US 5,545,012 ARule Industries, Inc. · 1996