G01R 31/64
Testing of capacitors
G01R31/64 (Testing of capacitors) appears on 429 US grants and 470 published applications in this corpus.
Search patents in G01R- Granted patents
- 429
- Published applications
- 470
- Assignees
- 301
- Inventors
- 1,104
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 4 |
| 2003 | 7 | 5 |
| 2004 | 2 | 1 |
| 2005 | 2 | 5 |
| 2006 | 5 | 2 |
| 2007 | 4 | 4 |
| 2008 | 2 | 11 |
| 2009 | 3 | 10 |
| 2010 | 7 | 12 |
| 2011 | 6 | 13 |
| 2012 | 10 | 16 |
| 2013 | 11 | 25 |
| 2014 | 13 | 25 |
| 2015 | 19 | 29 |
| 2016 | 25 | 24 |
| 2017 | 27 | 18 |
| 2018 | 20 | 27 |
| 2019 | 28 | 21 |
| 2020 | 30 | 35 |
| 2021 | 29 | 32 |
| 2022 | 35 | 36 |
| 2023 | 29 | 28 |
| 2024 | 25 | 40 |
| 2025 | 26 | 25 |
| 2026 | 17 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Lifetime estimation of electrolytic capacitors29 Sep 2026US 12,748,160 B2Delta Electronics (Thailand) Public Co., Ltd.
- Method for detecting a ground fault, a control unit and an energy storage system8 Sep 2026US 12,730,158 B2Hitachi Energy Ltd
- Method for measuring DC bias aging characteristics of multilayer capacitor25 Aug 2026US 12,716,962 B2Samsung Electro-Mechanics Co., Ltd.
- Inspection apparatus and inspection method14 Jul 2026US 12,681,109 B2Tokyo Weld Co., Ltd.
- Method for evaluating the degradation level of capacitors of a power filter, adjustable speed drive and power converter provided for performing the method9 Jun 2026US 12,650,477 B2Danfoss Power Electronics A/S
- Method and Apparatus for Determining Maintenance of DC Busbar Filtering Electrolytic Capacitor17 Sep 2026US 2026/0276741 A1Siemens Aktiengesellschaft
- Inspection device and inspection method27 Aug 2026US 2026/0251729 A1Denso Corporation
- Control device for activating and deactivating a y-capacitor, inverter and electric drive system6 Aug 2026US 2026/0225451 A1Robert Bosch GmbH
- Nuclear Magnetic Resonance Measurements on Electrical Components Such as in Particular Batteries and Capacitors9 Jul 2026US 2026/0194479 A1
- Early detection of metallized film capacitor failure9 Jul 2026US 2026/0194602 A1International Business Machines Corporation
Most cited
By later US patents
- Method and device for predicting electrolytic capacitor defects, converter and uninterruptible power supply equipped with such a device183US 8,090,548 B2MGE UPS Systems · 2012
- Capacitor failure detection139US 8,128,549 B2Neuronetics, Inc. · 2012
- Apparatus and methods for measuring and detecting variations in the value of a capacitor86US 5,586,042 AHughey-Pisau, Ltd. · 1996
- Method and apparatus for measuring on-wafer lumped capacitances in integrated circuits82US 6,560,567 B12003
- VLF Capacitor corona detection58US 4,245,187 AThe United States of America as represented by the Secretary of the Navy · 1981