G01R 31/3271
Of high voltage or medium voltage devices
Official title: {of high voltage or medium voltage devices (G01R31/333 takes precedence)}
G01R31/3271 (Of high voltage or medium voltage devices) appears on 552 US grants and 614 published applications in this corpus.
Search patents in G01R- Granted patents
- 552
- Published applications
- 614
- Assignees
- 315
- Inventors
- 1,498
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 0 |
| 2002 | 8 | 3 |
| 2003 | 3 | 5 |
| 2004 | 4 | 6 |
| 2005 | 5 | 6 |
| 2006 | 7 | 4 |
| 2007 | 5 | 5 |
| 2008 | 6 | 4 |
| 2009 | 2 | 3 |
| 2010 | 3 | 12 |
| 2011 | 1 | 11 |
| 2012 | 10 | 16 |
| 2013 | 6 | 15 |
| 2014 | 8 | 23 |
| 2015 | 16 | 19 |
| 2016 | 19 | 40 |
| 2017 | 35 | 45 |
| 2018 | 25 | 37 |
| 2019 | 45 | 26 |
| 2020 | 37 | 54 |
| 2021 | 28 | 51 |
| 2022 | 51 | 60 |
| 2023 | 49 | 48 |
| 2024 | 58 | 44 |
| 2025 | 45 | 46 |
| 2026 | 29 | 31 |
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
- Magnetic field-based detection method and system for circuit breaker switching operation and arc duration detection8 Sep 2026US 12,730,153 B2Georgia Tech Research Corporation
- Process for detection of degradation of a switching device comprising an electromagnetic actuator1 Sep 2026US 12,724,072 B2Schneider Electric Industries SAS
- Shutdown device detection and control method, and detector11 Aug 2026US 12,704,549 B2Altenergy Power System Inc.
- End of life monitoring for a solid-state circuit breaker11 Aug 2026US 12,706,267 B2Siemens Industry, Inc.
- System and method for determining alignment faulted mobile irrigation tower8 Oct 2026US 2026/0305546 A1Lindsay Corporation
- Electric testing systems8 Oct 2026US 2026/0309779 A1
- Simulation verification method and apparatus for gas density relay27 Aug 2026US 2026/0251713 A1Shanghai Roye Electric Co., Ltd.
- Method and apparatus for calculating electric arc radiation energy of electric power switch device, and device20 Aug 2026US 2026/0243827 A1Electric Power Research Institute. China Southern Power Grid
- System and method for fault diagnosis for cascaded h-bridge (chb) converter based switched reluctance motor (srm) drive systems20 Aug 2026US 2026/0243828 A1Enedym Inc.
Most cited
By later US patents
- Method and apparatus for testing an AFCI/GFCI circuit breaker121US 6,426,632 B12002
- Test circuit for an AFCI/GFCI circuit breaker81US 6,191,589 B12001
- Hand-held tester for receptacle ground fault circuit interrupters77US 5,642,052 AEtcon Corporation · 1997
- Method of precisely determining the location of a fault on an electrical transmission system74US 6,822,457 B22004
- Microcomputer based electronic trip system for circuit breakers70US 5,136,458 ASquare D Company · 1992