G01R 31/14
Circuits therefor
Official title: Circuits therefor {, e.g. for generating test voltages, sensing circuits (G01R31/1209 - G01R31/1227 take precedence; for testing switches G01R31/327)}
G01R31/14 (Circuits therefor) appears on 376 US grants and 463 published applications in this corpus.
Search patents in G01R- Granted patents
- 376
- Published applications
- 463
- Assignees
- 298
- Inventors
- 1,170
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 6 |
| 2003 | 8 | 4 |
| 2004 | 2 | 4 |
| 2005 | 5 | 4 |
| 2006 | 7 | 4 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 9 |
| 2011 | 4 | 17 |
| 2012 | 5 | 21 |
| 2013 | 10 | 11 |
| 2014 | 11 | 16 |
| 2015 | 17 | 30 |
| 2016 | 19 | 18 |
| 2017 | 19 | 29 |
| 2018 | 24 | 18 |
| 2019 | 28 | 18 |
| 2020 | 20 | 28 |
| 2021 | 25 | 31 |
| 2022 | 20 | 29 |
| 2023 | 33 | 39 |
| 2024 | 28 | 40 |
| 2025 | 36 | 42 |
| 2026 | 21 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Arcing detection system6 Oct 2026US 12,754,226 B2Nitto Kogyo Co., Ltd.
- System and method for analysis of the insulation condition of an electrical machine by the phases, and, storage media8 Sep 2026US 12,730,140 B2PS Soluções Indústria, Comércio, Representações e Consultoria Ltda
- Partial discharge monitoring system and partial discharge monitoring method18 Aug 2026US 12,710,465 B2Ls Cable & System Ltd.
- Battery apparatus and battery management system for measuring insulation resistance11 Aug 2026US 12,704,539 B2LG Energy Solution, Ltd.
- Method and apparatus for performing a surge test of electrical insulation11 Aug 2026US 12,704,551 B2Megger Instruments Limited
- Signal injection based electrical arc detection8 Oct 2026US 2026/0309766 A1Tesla, Inc.
- Host system with a liquid detector8 Oct 2026US 2026/0313840 A1Aivres Systems Inc.
- Insulation fault detection device, electrical power supply system, and a method for detecting an insulation fault1 Oct 2026US 2026/0299001 A1H55 SA
- Insulation monitoring device (imd), system for monitoring insulation and method for monitoring insulation of imd24 Sep 2026US 2026/0287636 A1Ls Electric Co., Ltd.
- System and method to generate multi-level voltage pulses for electrical insulation testing17 Sep 2026US 2026/0276693 A1
Most cited
By later US patents
- Direct current electrical system arc detection apparatus and method202US 6,633,824 B2Siemens Energy & Automation, Inc. · 2003
- Arcing fault detector122US 5,121,282 A1992
- Circuit protection device with timed negative half-cycle self test82US 6,980,005 B2Pass & Seymar, Inc. · 2005
- Arc fault circuit interrupter recognizing arc noise burst patterns79US 6,839,208 B2Pass & Seymour, Inc. · 2005
- Intelligent analysis system and method for fluid-filled electrical equipment54US 6,446,027 B1General Electric Company · 2002