G01R 31/3277
Of low voltage devices
Official title: {of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches}
G01R31/3277 (Of low voltage devices) appears on 966 US grants and 1,039 published applications in this corpus.
Search patents in G01R- Granted patents
- 966
- Published applications
- 1,039
- Assignees
- 509
- Inventors
- 2,283
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 0 |
| 2002 | 8 | 4 |
| 2003 | 8 | 9 |
| 2004 | 10 | 11 |
| 2005 | 8 | 9 |
| 2006 | 4 | 15 |
| 2007 | 12 | 13 |
| 2008 | 8 | 7 |
| 2009 | 11 | 14 |
| 2010 | 9 | 18 |
| 2011 | 8 | 20 |
| 2012 | 14 | 17 |
| 2013 | 19 | 32 |
| 2014 | 17 | 34 |
| 2015 | 28 | 54 |
| 2016 | 31 | 51 |
| 2017 | 58 | 70 |
| 2018 | 51 | 67 |
| 2019 | 70 | 59 |
| 2020 | 74 | 110 |
| 2021 | 88 | 87 |
| 2022 | 91 | 73 |
| 2023 | 70 | 66 |
| 2024 | 64 | 71 |
| 2025 | 69 | 70 |
| 2026 | 44 | 58 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low current leakage measurement on a high current unified static and dynamic characterization platform29 Sep 2026US 12,748,145 B2Keithley Instruments, LLC
- Cloud-based line differential relays dynamic testing29 Sep 2026US 12,748,147 B2AVO Multi-Amp Corporation
- Secure communication for commissioning and decommissioning circuit breakers and panel system29 Sep 2026US 12,750,674 B2Leviton Manufacturing Co., Inc.
- Process for detection of degradation of a switching device comprising an electromagnetic actuator1 Sep 2026US 12,724,072 B2Schneider Electric Industries SAS
- Method and device for testing protection relays1 Sep 2026US 12,724,073 B2Megger Sweden AB
- 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
- Weld detection in voltage traction systems3 Sep 2026US 2026/0257560 A1Volvo Truck Corporation
- Multi-Remote Circuit Breaker Finder3 Sep 2026US 2026/0259265 A1Klein Tools, Inc.
- Method and controller for an electric load with switch testing3 Sep 2026US 2026/0259280 A1Deere & Company
Most cited
By later US patents
- Self testing circuit breaker ground fault and sputtering arc trip unit204US 5,459,630 AEaton Corporation · 1995
- Methods and systems for automatic testing of a relay147US 5,742,513 AABB Power T&D Company Inc. · 1998
- Circuit breaker with integrated control features116US 5,875,087 A1999
- Circuit protection device with grounded neutral half cycle self test78US 7,253,629 B1Pass & Seymour, Inc. · 2007
- Hand-held tester for receptacle ground fault circuit interrupters77US 5,642,052 AEtcon Corporation · 1997