H02H 3/353
Involving comparison of phase voltages
Official title: involving comparison of phase voltages
H02H3/353 (Involving comparison of phase voltages) appears on 26 US grants and 26 published applications in this corpus.
Search patents in H02H- Granted patents
- 26
- Published applications
- 26
- Assignees
- 29
- Inventors
- 64
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 2 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 0 | 1 |
| 2016 | 1 | 2 |
| 2017 | 0 | 1 |
| 2018 | 2 | 4 |
| 2019 | 3 | 3 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 2 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Fault classification and zone identification in a power transmission system8 May 2025US 2025/0149874 A1Hitachi Energy Ltd
- Determining method and apparatus for working voltage of isolated neutral system18 Jul 2024US 2024/0241160 A1Siemens Aktiengesellschaft
- Fault classification and zone identification in a power transmission system22 Feb 2024US 2024/0063626 A1Hitachi Energy Switzerland AG
Most cited
By later US patents
- Fault detector for a three-phase alternating current supply51US 4,751,653 AAmerican Standard Inc. · 1988
- Chiller controls44US 4,084,406 AFedders Corporation · 1978
- Three phase power monitor36US 5,337,206 A1994
- Supply voltage auto-sensing21US 8,823,356 B2SolarBridge Technologies, Inc. · 2014
- Fault identification in electric power transmission systems19US 4,390,835 AGeneral Electric Company · 1983