G01R 31/327
Testing of circuit interrupters, switches or circuit-breakers
G01R31/327 (Testing of circuit interrupters, switches or circuit-breakers) appears on 1,701 US grants and 1,837 published applications in this corpus.
Search patents in G01R- Granted patents
- 1,701
- Published applications
- 1,837
- Assignees
- 776
- Inventors
- 3,981
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 10 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 11 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 15 | 1 |
| 2002 | 19 | 7 |
| 2003 | 11 | 16 |
| 2004 | 18 | 20 |
| 2005 | 17 | 17 |
| 2006 | 15 | 19 |
| 2007 | 18 | 20 |
| 2008 | 15 | 14 |
| 2009 | 14 | 22 |
| 2010 | 16 | 31 |
| 2011 | 11 | 37 |
| 2012 | 27 | 36 |
| 2013 | 30 | 69 |
| 2014 | 29 | 81 |
| 2015 | 58 | 104 |
| 2016 | 78 | 104 |
| 2017 | 113 | 122 |
| 2018 | 90 | 108 |
| 2019 | 119 | 94 |
| 2020 | 125 | 166 |
| 2021 | 129 | 140 |
| 2022 | 140 | 139 |
| 2023 | 117 | 131 |
| 2024 | 134 | 122 |
| 2025 | 131 | 125 |
| 2026 | 81 | 92 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ion pump monitored vacuum interrupter6 Oct 2026US 12,755,626 B2Southern States, LLC
- Arrangement and method for automatically configuring a magnetic drive6 Oct 2026US 12,755,912 B2Siemens Aktiengesellschaft
- Electrical contact assembly having conductive clamp assembly and associated methods6 Oct 2026US 12,756,163 B2Jst Power Equipment, Inc.
- 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
- System and method for determining alignment faulted mobile irrigation tower8 Oct 2026US 2026/0305546 A1Lindsay Corporation
- Electric testing systems8 Oct 2026US 2026/0309779 A1
- 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
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
- Fail safe fault interrupter144US 6,262,871 B1X-L Synergy · 2001
- Method and systems for electromagnetic protection with persistent self monitoring and cybersecure local and remote status report130US 11,469,592 B12022
- Method and apparatus for testing an AFCI/GFCI circuit breaker121US 6,426,632 B12002