G01N 27/228
Circuits therefor
Official title: {Circuits therefor (measuring capacitance per se G01R27/26)}
G01N27/228 (Circuits therefor) appears on 261 US grants and 322 published applications in this corpus.
Search patents in G01N- Granted patents
- 261
- Published applications
- 322
- Assignees
- 226
- Inventors
- 642
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 4 |
| 2004 | 0 | 4 |
| 2005 | 5 | 4 |
| 2006 | 3 | 2 |
| 2007 | 1 | 1 |
| 2008 | 0 | 3 |
| 2009 | 1 | 0 |
| 2010 | 2 | 3 |
| 2011 | 0 | 4 |
| 2012 | 1 | 4 |
| 2013 | 1 | 6 |
| 2014 | 3 | 9 |
| 2015 | 8 | 15 |
| 2016 | 13 | 18 |
| 2017 | 16 | 14 |
| 2018 | 13 | 20 |
| 2019 | 16 | 29 |
| 2020 | 23 | 36 |
| 2021 | 27 | 36 |
| 2022 | 31 | 31 |
| 2023 | 24 | 13 |
| 2024 | 18 | 24 |
| 2025 | 21 | 26 |
| 2026 | 13 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Automated and wireless accelerated heat treat life testing system29 Sep 2026US 12,748,009 B2UIF (University Industry Foundation), Yonsei University
- Low power variable frequency soil sensor assembly22 Sep 2026US 12,742,745 B2
- Electronic device including dew condensation sensor18 Aug 2026US 12,710,389 B2LG Electronics Inc.
- Pixelated mutual capacitance sensing for water detection16 Jun 2026US 12,656,909 B2Apple Inc.
- Real-time monitoring device and method for surface salt deposition amount14 Apr 2026US 12,601,700 B2China National Electric Apparatus Research Institute Co., Ltd.
- Device and method of measuring the water content in the refrigerant of a refrigeration cycle8 Oct 2026US 2026/0309665 A1Danfoss A/S
- Device and method of measuring the gas-to-liquid ratio of the refrigerant of a refrigeration cycle8 Oct 2026US 2026/0309667 A1Danfoss A/S
- Systems and methods for evaluating multiphase mixtures17 Sep 2026US 2026/0276620 A1Schlumberger Technology Corporation
- Pixelated mutual capacitance sensing for water detection17 Sep 2026US 2026/0277365 A1Apple Inc.
- Measurement device for determining dielectric constant and conductivity10 Sep 2026US 2026/0266752 A1Endress + Hauser GmbH + Co. KG
Most cited
By later US patents
- Method and apparatus for converting capacitance to voltage66US 6,356,085 B1Pacesetter, Inc. · 2002
- Flexible sensor patch and method of using the same58US 10,209,213 B23M Innovative Properties Company · 2019
- Multiple-frequency permittivity tester55US 4,058,766 AAgridustrial Electronics, Inc. · 1977
- Method for imaging multiphase flow using electrical capacitance tomography54US 7,496,450 B2Instituto Mexicano Del Petroleo · 2009
- Capacitive sensor and method of measuring changes in capacitance50US 5,585,733 ADavid Sarnoff Research Center, Inc. · 1996