G01N 27/221
By investigating the dielectric properties
Official title: {by investigating the dielectric properties (using microwaves G01N22/00; measuring loss factors or dielectric constants per se G01R27/26)}
G01N27/221 (By investigating the dielectric properties) appears on 751 US grants and 729 published applications in this corpus.
Search patents in G01N- Granted patents
- 751
- Published applications
- 729
- Assignees
- 559
- Inventors
- 1,987
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 8 | 0 |
| 1989 | 7 | 0 |
| 1990 | 11 | 0 |
| 1991 | 8 | 0 |
| 1992 | 14 | 0 |
| 1993 | 17 | 0 |
| 1994 | 9 | 0 |
| 1995 | 15 | 0 |
| 1996 | 11 | 0 |
| 1997 | 9 | 0 |
| 1998 | 9 | 0 |
| 1999 | 17 | 0 |
| 2000 | 6 | 0 |
| 2001 | 14 | 2 |
| 2002 | 15 | 12 |
| 2003 | 20 | 13 |
| 2004 | 8 | 14 |
| 2005 | 13 | 12 |
| 2006 | 9 | 7 |
| 2007 | 4 | 6 |
| 2008 | 2 | 12 |
| 2009 | 3 | 11 |
| 2010 | 5 | 11 |
| 2011 | 5 | 18 |
| 2012 | 13 | 11 |
| 2013 | 7 | 21 |
| 2014 | 23 | 28 |
| 2015 | 15 | 28 |
| 2016 | 18 | 33 |
| 2017 | 30 | 35 |
| 2018 | 34 | 45 |
| 2019 | 33 | 64 |
| 2020 | 57 | 77 |
| 2021 | 46 | 52 |
| 2022 | 53 | 49 |
| 2023 | 42 | 39 |
| 2024 | 47 | 49 |
| 2025 | 46 | 41 |
| 2026 | 24 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Construction material assessment method and systems6 Oct 2026US 12,754,146 B2
- Fertigation feed sensor system29 Sep 2026US 12,748,096 B2Addium, Inc.
- Detecting and imaging using dielectric tomography15 Sep 2026US 12,736,481 B2OmniZare Imaging Inc.
- Systems and methods for sensing of gases using a configurable dynamic range of a sensor1 Sep 2026US 12,723,997 B2GE Infrastructure Technology LLC
- Oil state detection apparatus28 Jul 2026US 12,693,250 B2Nippon Pillar Packing Co., Ltd.
- Device and method of measuring the water content in the refrigerant of a refrigeration cycle8 Oct 2026US 2026/0309665 A1Danfoss A/S
- Ultrasonic electromagnetic sensor for multiphase cut measurements and associated methods1 Oct 2026US 2026/0298858 A1PERM Inc.
- Sensor Device and Method for Detecting Properties of a Medium1 Oct 2026US 2026/0298860 A1Kyocera AVX Components (Werne) GmbH
- Aldehyde and ketone receptor modification of graphene24 Sep 2026US 2026/0283500 A1Regents of the University of Minnesota
- Systems and methods for measuring kinetic response of chemical sensor elements24 Sep 2026US 2026/0287535 A1Regents of the University of Minnesota
Most cited
By later US patents
- Optical and electrical methods and apparatus for molecule detection589US 5,846,708 AMassachusetts Institiute of Technology · 1998
- Optical and electrical methods and apparatus for molecule detection585US 5,653,939 ABaylor College of Medicine · 1997
- Device for gas-sensoring electrodes330US 6,325,979 B1Robert Bosch GmbH · 2001
- Electronic techniques for analyte detection312US 6,627,154 B1Cyrano Sciences, Inc. · 2003
- Multi-site detection apparatus278US 5,532,128 AHouston Advanced Research Center · 1996