G01R 27/02
Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived
Official title: Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant (by measuring phase angle only G01R25/00)
G01R27/02 (Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived) appears on 5,779 US grants and 5,143 published applications in this corpus.
Search patents in G01R- Granted patents
- 5,779
- Published applications
- 5,143
- Assignees
- 2,692
- Inventors
- 11,724
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 81 | 0 |
| 1977 | 63 | 0 |
| 1978 | 69 | 0 |
| 1979 | 44 | 0 |
| 1980 | 54 | 0 |
| 1981 | 62 | 0 |
| 1982 | 47 | 0 |
| 1983 | 39 | 0 |
| 1984 | 39 | 0 |
| 1985 | 43 | 0 |
| 1986 | 32 | 0 |
| 1987 | 51 | 0 |
| 1988 | 72 | 0 |
| 1989 | 92 | 0 |
| 1990 | 38 | 0 |
| 1991 | 42 | 0 |
| 1992 | 43 | 0 |
| 1993 | 32 | 0 |
| 1994 | 47 | 0 |
| 1995 | 58 | 0 |
| 1996 | 65 | 0 |
| 1997 | 34 | 0 |
| 1998 | 37 | 0 |
| 1999 | 40 | 0 |
| 2000 | 28 | 0 |
| 2001 | 66 | 19 |
| 2002 | 54 | 64 |
| 2003 | 52 | 55 |
| 2004 | 83 | 68 |
| 2005 | 69 | 89 |
| 2006 | 89 | 61 |
| 2007 | 65 | 57 |
| 2008 | 46 | 102 |
| 2009 | 61 | 101 |
| 2010 | 67 | 86 |
| 2011 | 54 | 145 |
| 2012 | 73 | 134 |
| 2013 | 122 | 254 |
| 2014 | 164 | 332 |
| 2015 | 224 | 335 |
| 2016 | 314 | 243 |
| 2017 | 329 | 280 |
| 2018 | 307 | 301 |
| 2019 | 316 | 344 |
| 2020 | 341 | 336 |
| 2021 | 304 | 326 |
| 2022 | 292 | 314 |
| 2023 | 309 | 310 |
| 2024 | 275 | 301 |
| 2025 | 301 | 319 |
| 2026 | 150 | 167 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01R 27/26Measuring inductance or capacitance2,722
- G01R 27/16Measuring impedance of element or network through which a current is passing725
- G01R 27/04In circuits having distributed constants531
- G01R 27/14Measuring resistance by measuring current or voltage obtained from a reference source393
- G01R 27/08Measuring resistance by measuring both voltage and current329
- G01R 27/025Measuring very high resistances317
- G01R 27/20Measuring earth resistance257
- G01R 27/22Measuring resistance of fluids232
Recent patents
- Line sensor comprising a capacitive divider with integrated slot antenna6 Oct 2026US 12,754,212 B2Comrod AS
- Circuit for operating a capacitive sensor and sensor apparatus6 Oct 2026US 12,754,221 B2Robert Bosch GmbH
- Sensor controller, electronic device, and control method of sensor controller6 Oct 2026US 12,754,634 B2Wacom Co., Ltd.
- Phase discriminator for reflected waves and operating method thereof29 Sep 2026US 12,748,138 B2Electronics and Telecommunications Research Institute
- Power conversion system and control method therefor29 Sep 2026US 12,748,139 B2Zhejiang Jinko Energy Storage Co., Ltd.
- Measuring device for capacitance of semiconductor device and measurement jig1 Oct 2026US 2026/0298991 A1Mitsubishi Electric Corporation
- Method and system for adaptively obtaining a corrected apparent impedance1 Oct 2026US 2026/0302776 A1Hitachi Energy Ltd
- Systems and methods for utilizing two-dimensional displacement for inductive sensing24 Sep 2026US 2026/0287397 A1Cirrus Logic International Semiconductor Ltd.
- Capacitive detection device and methods24 Sep 2026US 2026/0287410 A1Beckman Coulter, Inc.
- Measuring method and measuring system24 Sep 2026US 2026/0287536 A1Hioki E. E. Corporation
Most cited
By later US patents
- Time domain capacitive field detector800US 5,730,165 A1998
- Capacitive field sensor with sigma-delta modulator414US 8,089,289 B1Cypress Semiconductor Corporation · 2012
- Liquid conductivity measuring system and sample cards therefor394US 4,301,412 AUnited States Surgical Corporation · 1981
- Level sensing372US 6,457,355 B12002
- Implantable sensor electrodes and electronic circuitry357US 6,809,507 B2Medtronic MiniMed, Inc. · 2004