H02H 3/30
Using pilot wires or other signalling channel
Official title: using pilot wires or other signalling channel
H02H3/30 (Using pilot wires or other signalling channel) appears on 111 US grants and 97 published applications in this corpus.
Search patents in H02H- Granted patents
- 111
- Published applications
- 97
- Assignees
- 71
- Inventors
- 255
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 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 | 1 | 1 |
| 2003 | 3 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 4 |
| 2009 | 1 | 2 |
| 2010 | 2 | 5 |
| 2011 | 2 | 8 |
| 2012 | 5 | 8 |
| 2013 | 7 | 10 |
| 2014 | 8 | 6 |
| 2015 | 9 | 3 |
| 2016 | 4 | 3 |
| 2017 | 5 | 10 |
| 2018 | 2 | 6 |
| 2019 | 6 | 7 |
| 2020 | 6 | 3 |
| 2021 | 8 | 5 |
| 2022 | 6 | 1 |
| 2023 | 3 | 4 |
| 2024 | 3 | 3 |
| 2025 | 1 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Protective device with multi-channel line current differential protection14 Apr 2026US 12,603,490 B2Schweitzer Engineering Laboratories, Inc.
- Fault monitoring method for multi-port internal passive load-free probabilistic load flow electric network23 Sep 2025US 12,424,835 B2Baoding Yuxin Electric Technology Co., Ltd.
- Integrated circuit-based nano-relay10 Sep 2024US 12,088,082 B2Digital Grid Research Institute, China Southern Power Grid
- Time synchronization between IEDs of different substations4 Jun 2024US 12,003,087 B2Hitachi Energy Ltd
- Differential protection device and protection system for monitoring objects to be protected in a power supply network20 Feb 2024US 11,909,194 B2Siemens Aktiengesellschaft
- System for power line differential protection27 Aug 2026US 2026/0254241 A1Hitachi Energy Ltd
- Sampling synchronization method for differential protection device, differential protection device and system15 May 2025US 2025/0155479 A1Schneider Electric Industries SAS
- Protective device with multi-channel line current differential protection1 May 2025US 2025/0141205 A1Schweitzer Engineering Laboratories, Inc.
- Method of determining fault of power system16 Jan 2025US 2025/0020735 A1ABB Schweiz AG
- Method and system for protecting an electrical distribution network comprising at least two sources of electrical energy12 Sep 2024US 2024/0305090 A1Schneider Electric Industries SAS
Most cited
By later US patents
- Power distribution system with fault protection using energy packet confirmation92US 8,068,937 B22011
- Line differential protection system for a power transmission line66US 6,518,767 B1Schweitzer Engineering Laboratories, Inc. · 2003
- Line differential protection system for a power transmission line49US 6,590,397 B2Schweitzer Engineering Laboratories, Inc. · 2003
- System, apparatus and method for compensating the sensitivity of a sequence element in a line current differential relay in a power system46US 7,660,088 B2Schweitzer Engineering Laboratories, Inc. · 2010
- Delta filter with an adaptive time window for protective relays35US 6,417,791 B1Schweitzer Engineering Laboratories, Inc. · 2002