G01R 27/2688
Measuring quality factor or dielectric loss
Official title: {Measuring quality factor or dielectric loss, e.g. loss angle, or power factor (power factor related to power measurements G01R21/006; testing capacitors G01R31/016)}
G01R27/2688 (Measuring quality factor or dielectric loss) appears on 135 US grants and 126 published applications in this corpus.
Search patents in G01R- Granted patents
- 135
- Published applications
- 126
- Assignees
- 102
- Inventors
- 257
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 19 |
| 2003 | 2 | 4 |
| 2004 | 14 | 7 |
| 2005 | 12 | 7 |
| 2006 | 3 | 0 |
| 2007 | 6 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 4 | 3 |
| 2012 | 1 | 2 |
| 2013 | 2 | 3 |
| 2014 | 0 | 3 |
| 2015 | 3 | 10 |
| 2016 | 5 | 2 |
| 2017 | 6 | 7 |
| 2018 | 3 | 4 |
| 2019 | 7 | 9 |
| 2020 | 11 | 9 |
| 2021 | 7 | 7 |
| 2022 | 6 | 4 |
| 2023 | 3 | 6 |
| 2024 | 4 | 2 |
| 2025 | 7 | 8 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Friendly metal loss estimation for wireless power transfer14 Jul 2026US 12,683,436 B2Apple Inc.
- Method and device for slot generation in wireless power transmission system16 Jun 2026US 12,658,738 B2LG Electronics Inc.
- Method and device for measuring high voltage devices using a correction factor26 May 2026US 12,638,516 B2Megger Sweden AB
- Capacitor test3 Mar 2026US 12,566,205 B2Micron Technology, Inc.
- Systems and methods for PLP capacitor health check2 Dec 2025US 12,487,262 B2Kioxia Corporation
- Method and device for slot generation in wireless power transmission system17 Sep 2026US 2026/0280356 A1LG Electronics Inc.
- Method and apparatus for q-factor detection with reduced core interaction5 Mar 2026US 2026/0063695 A1NXP B. V.
- Q-factor continuous excitation method and apparatus5 Mar 2026US 2026/0066710 A1NXP B. V.
- Wireless charging system and method for measuring q-value5 Feb 2026US 2026/0039148 A1NXP USA, Inc.
- Friendly metal loss estimation for wireless power transfer23 Oct 2025US 2025/0330051 A1Apple Inc.
Most cited
By later US patents
- System and method for dual-band antenna matching340US 7,180,467 B2Kyocera Wireless Corp. · 2007
- Tunable horn antenna238US 6,867,744 B2Kyocera Wireless Corp. · 2005
- Tunable matching circuit154US 6,825,818 B2Kyocera Wireless Corp. · 2004
- Tunable antenna matching circuit139US 6,765,540 B2Kyocera Wireless Corp. · 2004
- System and method for impedance matching an antenna to sub-bands in a communication band133US 7,176,845 B2Kyocera Wireless Corp. · 2007