H02H 3/253
For multiphase applications
Official title: for multiphase applications, e.g. phase interruption
H02H3/253 (For multiphase applications) appears on 79 US grants and 45 published applications in this corpus.
Search patents in H02H- Granted patents
- 79
- Published applications
- 45
- Assignees
- 52
- Inventors
- 145
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 0 | 1 |
| 2007 | 2 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 4 |
| 2014 | 2 | 2 |
| 2015 | 2 | 2 |
| 2016 | 0 | 4 |
| 2017 | 3 | 3 |
| 2018 | 3 | 1 |
| 2019 | 5 | 5 |
| 2020 | 5 | 5 |
| 2021 | 4 | 4 |
| 2022 | 3 | 3 |
| 2023 | 3 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Single phase broken conductor detection4 Nov 2025US 12,461,171 B2Schweitzer Engineering Laboratories, Inc.
- Power cord LCDI and hotspot detector circuit31 Dec 2024US 12,184,056 B2
- Uninterruptible power supply device26 Dec 2023US 11,855,483 B2Nissin Electric Co., Ltd.
- Dependable open-phase detection in electric power delivery systems with inverter-based resources22 Aug 2023US 11,735,908 B2Schweitzer Engineering Laboratories, Inc.
- Method for operating converter and converter arrangement21 Feb 2023US 11,588,414 B2ABB Schweiz AG
- Adaptive undervoltage protection for three-phase load using single current sensor5 Jun 2025US 2025/0183652 A1Copeland Comfort Control LP
- Single phase broken conductor detection8 May 2025US 2025/0147123 A1Schweitzer Engineering Laboratories, Inc.
- Power cord lcdi and hotspot detector circuit15 Aug 2024US 2024/0275157 A1Tower Manufacturing Corporation
- Merging unit verification using unique identifiers8 Sep 2022US 2022/0286534 A1Schweitzer Engineering Laboratories, Inc.
- Dependable open-phase detection in electric power delivery systems with inverter-based resources18 Aug 2022US 2022/0263310 A1Schweitzer Engineering Laboratories, Inc.
Most cited
By later US patents
- Phase monitor and protection apparatus66US 5,570,258 ATexas Instruments Incorporated · 1996
- Dimmer circuit with improved ripple control54US 7,339,331 B2Clipsal Intergrated Systems Pty Ltd · 2008
- Fault detector for a three-phase alternating current supply51US 4,751,653 AAmerican Standard Inc. · 1988
- Digital voltage and phase monitor for AC power line34US 5,319,514 AVoltage Control, Inc., a Montana corporation · 1994
- Missing phase detection circuit for use with three-phase power sources20US 3,999,087 AWestinghouse Electric Corp. · 1976