H02H 3/302
Involving phase comparison
Official title: {involving phase comparison}
H02H3/302 (Involving phase comparison) appears on 19 US grants and 9 published applications in this corpus.
Search patents in H02H- Granted patents
- 19
- Published applications
- 9
- Assignees
- 13
- Inventors
- 25
- Latest grant
- 14 Jul 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 2 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Ground fault overvoltage relay device14 Jul 2020US 10,714,924 B2Mitsubishi Electric Corporation
- Network protector control for spot network fed from feeder sources having voltage differences9 Oct 2018US 10,096,991 B2Eaton Intelligent Power Limited
- RF phase offset detection circuit21 Aug 2018US 10,056,888 B2Qorvo US, Inc.
- Protective relaying device16 Jun 2015US 9,057,744 B2Kabushiki Kaisha Toshiba
- Method and apparatus for providing differential protection for an electrical link in a medium, high, or very high voltage network11 Jun 2013US 8,462,476 B2Areva T & D Protection & Controle
- Method of determining fault of power system16 Jan 2025US 2025/0020735 A1ABB Schweiz AG
- Ground fault overvoltage relay device6 Dec 2018US 2018/0351345 A1Mitsubishi Electric Corporation
- Network protector control for spot network fed from feeder sources having voltage differences14 Dec 2017US 2017/0358919 A1Cooper Technologies Company
- Rf phase offset detection circuit28 Sep 2017US 2017/0279439 A1Qorvo US, Inc.
- Protective relaying device11 Apr 2013US 2013/0090875 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Method and apparatus for transmission line phase angle comparisons30US 6,148,267 AGeneral Electric Company · 2000
- Power line carrier apparatus23US 4,205,360 AWestinghouse Electric Corp. · 1980
- Segregated phase comparison system22US 3,963,964 AWestinghouse Electric Corp. · 1976
- Protective relay apparatus12US 4,234,901 AWestinghouse Electric Corp. · 1980
- Method and system for communications channel delay asymmetry compensation using global positioning systems10US 7,126,800 B2General Electric Company · 2006