G01R 31/3278
Of relays, solenoids or reed switches
Official title: {of relays, solenoids or reed switches (measuring contact resistance G01R27/205; high voltage magnetic switches G01R31/3271, G01R31/333; testing electric windings G01R31/72; monitoring of fail safe circuits H01H47/002)}
G01R31/3278 (Of relays, solenoids or reed switches) appears on 474 US grants and 485 published applications in this corpus.
Search patents in G01R- Granted patents
- 474
- Published applications
- 485
- Assignees
- 270
- Inventors
- 1,089
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 1 |
| 2003 | 5 | 5 |
| 2004 | 3 | 6 |
| 2005 | 7 | 7 |
| 2006 | 2 | 7 |
| 2007 | 5 | 6 |
| 2008 | 5 | 3 |
| 2009 | 5 | 4 |
| 2010 | 2 | 6 |
| 2011 | 1 | 11 |
| 2012 | 4 | 5 |
| 2013 | 10 | 17 |
| 2014 | 6 | 15 |
| 2015 | 15 | 27 |
| 2016 | 15 | 20 |
| 2017 | 26 | 28 |
| 2018 | 28 | 40 |
| 2019 | 31 | 31 |
| 2020 | 39 | 49 |
| 2021 | 46 | 43 |
| 2022 | 46 | 35 |
| 2023 | 31 | 30 |
| 2024 | 36 | 35 |
| 2025 | 30 | 27 |
| 2026 | 17 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cloud-based line differential relays dynamic testing29 Sep 2026US 12,748,147 B2AVO Multi-Amp Corporation
- Method and device for testing protection relays1 Sep 2026US 12,724,073 B2Megger Sweden AB
- Battery pack control apparatus and method for fixing failure of relay1 Sep 2026US 12,726,016 B2Samsung SDI.Co., Ltd.
- Apparatus and method for monitoring status of relay circuit16 Jun 2026US 12,658,391 B2Samsung SDI.Co., Ltd.
- Switch diagnostic device and battery pack including the same26 May 2026US 12,638,504 B2Samsung SDI.Co., Ltd.
- Relay Diagnostic Circuit and Battery Device Comprising the Same8 Oct 2026US 2026/0309780 A1LG Energy Solution, Ltd.
- System and method for inspection of car electromagnetic actuators using a scan tool1 Oct 2026US 2026/0298995 A1Innova Electronics Corporation
- Method and controller for an electric load with switch testing3 Sep 2026US 2026/0259280 A1Deere & Company
- Grid relay fault detection6 Aug 2026US 2026/0227443 A1Lunar Energy, Inc.
- Detection device and detection method for charging pile23 Jul 2026US 2026/0211037 A1Wistron Corporation
Most cited
By later US patents
- Methods and systems for automatic testing of a relay147US 5,742,513 AABB Power T&D Company Inc. · 1998
- Electronic interlock for electromagnetic contactor56US 5,539,608 AEaton Corporation · 1996
- Method for detecting failure of a relay48US 6,909,285 B2Visteon Global Technologies, Inc. · 2005
- Diagnostic fault test system and circuit40US 4,932,246 AMotorola, Inc. · 1990
- Process and device for automatically detecting the response voltage of an electromagnetic component, in particular an electrovalve40US 4,990,854 ARobert Bosch GmbH · 1991