G01R 31/1218
Using optical methods
Official title: {using optical methods; using charged particle, e.g. electron, beams or X-rays}
G01R31/1218 (Using optical methods) appears on 106 US grants and 125 published applications in this corpus.
Search patents in G01R- Granted patents
- 106
- Published applications
- 125
- Assignees
- 111
- Inventors
- 363
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 1 | 2 |
| 2010 | 3 | 3 |
| 2011 | 1 | 2 |
| 2012 | 2 | 3 |
| 2013 | 2 | 4 |
| 2014 | 2 | 4 |
| 2015 | 2 | 4 |
| 2016 | 4 | 6 |
| 2017 | 4 | 6 |
| 2018 | 5 | 9 |
| 2019 | 4 | 8 |
| 2020 | 9 | 6 |
| 2021 | 9 | 14 |
| 2022 | 8 | 12 |
| 2023 | 11 | 10 |
| 2024 | 9 | 7 |
| 2025 | 5 | 10 |
| 2026 | 6 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Systems and methods for detection of electrical arcs and electrical component failure in power distribution systems13 Aug 2026US 2026/0237992 A1GE Aviation Systems LLC
- Device for sensing partial discharge of transformer30 Jul 2026US 2026/0219308 A1Hd Hyundai Electric Co., Ltd.
- Safety cover for monitoring electrochemical batteries, with temperature sensors9 Jul 2026US 2026/0194397 A1Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Active detection apparatus and method for discharge defect of line insulator25 Jun 2026US 2026/0177602 A1Wuxi Power Supply Branch of State Grid Jiangsu Electric Power Co., Ltd.
- Electrical arc flash detection11 Jun 2026US 2026/0160793 A1Chevron U.S.A.Inc.
Most cited
By later US patents
- Instantaneous arc fault light detector with resistance to false tripping34US 6,433,976 B1Square D Company · 2002
- Fiber-optical sensor for detecting electric arc-discharges27US 4,702,553 ABBC Brown, Boveri & Company, Limited · 1987
- Utility meter arc detection system26US 8,947,246 B2General Electric Company · 2015
- Arc detection system and method24US 7,580,232 B2General Electric Company · 2009
- Partial discharge detection system15US 9,753,080 B2Rosemount Inc. · 2017