H01H 47/004
Using plural redundant serial connected relay operated contacts in controlled circuit
Official title: {using plural redundant serial connected relay operated contacts in controlled circuit}
H01H47/004 (Using plural redundant serial connected relay operated contacts in controlled circuit) appears on 134 US grants and 113 published applications in this corpus.
Search patents in H01H- Granted patents
- 134
- Published applications
- 113
- Assignees
- 89
- Inventors
- 259
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 3 |
| 2003 | 7 | 6 |
| 2004 | 4 | 1 |
| 2005 | 1 | 6 |
| 2006 | 5 | 3 |
| 2007 | 8 | 4 |
| 2008 | 3 | 4 |
| 2009 | 2 | 4 |
| 2010 | 3 | 3 |
| 2011 | 5 | 3 |
| 2012 | 2 | 2 |
| 2013 | 1 | 3 |
| 2014 | 5 | 5 |
| 2015 | 2 | 5 |
| 2016 | 3 | 6 |
| 2017 | 7 | 4 |
| 2018 | 6 | 7 |
| 2019 | 5 | 7 |
| 2020 | 4 | 8 |
| 2021 | 14 | 5 |
| 2022 | 1 | 6 |
| 2023 | 6 | 7 |
| 2024 | 3 | 3 |
| 2025 | 7 | 2 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Relay, and method for operating a relay12 May 2026US 12,626,871 B2Robert Bosch GmbH
- Contactor assembly for battery pack of electric work vehicle2 Dec 2025US 12,485,777 B2Perkins Engines Company Limited
- Relay apparatus and safety switching device with relay apparatus30 Sep 2025US 12,431,308 B2Pilz GmbH & Co.KG
- Fault detection and automatic switching of relays5 Aug 2025US 12,381,557 B1Forsyth Robotics LLC
- Relay control apparatus, battery pack and electric vehicle29 Jul 2025US 12,370,894 B2LG Energy Solution, Ltd.
- Power supply device13 Aug 2026US 2026/0233616 A1Toyota Jidosha Kabushiki Kaisha
- Power supply switching device23 Jul 2026US 2026/0213101 A1OMRON Corporation
- Onboard electrical device16 Jul 2026US 2026/0200326 A1Toyota Jidosha Kabushiki Kaisha
- Monitoring circuit for redundant relays14 May 2026US 2026/0133251 A1Pepperl + Fuchs GmbH
- Relay Control Apparatus, Battery Pack and Electric Vehicle8 Jan 2026US 2026/0008348 A1LG Energy Solution, Ltd.
Most cited
By later US patents
- Fail safe fault interrupter144US 6,262,871 B1X-L Synergy · 2001
- Electronic fastening tool39US 7,285,877 B2Black & Decker Inc. · 2007
- Contact status monitor28US 5,455,733 AGMI Holdings, Inc. · 1995
- Switching equipment25US 6,023,110 AABB Research Ltd. · 2000
- Cut-off arrangement for and method of protecting a ballast-starter circuit from high pressure sodium lamp cycling malfunction24US 4,207,500 AArea Lighting Research, Inc. · 1980