G01N 22/00
Investigating or analysing materials by the use of microwaves or radio waves
Official title: Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more (G01N3/00 - G01N17/00, G01N24/00 take precedence)
G01N22/00 (Investigating or analysing materials by the use of microwaves or radio waves) appears on 1,561 US grants and 1,502 published applications in this corpus.
Search patents in G01N- Granted patents
- 1,561
- Published applications
- 1,502
- Assignees
- 977
- Inventors
- 3,429
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 3 | 0 |
| 1978 | 9 | 0 |
| 1979 | 5 | 0 |
| 1980 | 10 | 0 |
| 1981 | 11 | 0 |
| 1982 | 13 | 0 |
| 1983 | 5 | 0 |
| 1984 | 10 | 0 |
| 1985 | 13 | 0 |
| 1986 | 8 | 0 |
| 1987 | 15 | 0 |
| 1988 | 14 | 0 |
| 1989 | 16 | 0 |
| 1990 | 19 | 0 |
| 1991 | 21 | 0 |
| 1992 | 23 | 0 |
| 1993 | 11 | 0 |
| 1994 | 20 | 0 |
| 1995 | 14 | 0 |
| 1996 | 21 | 0 |
| 1997 | 21 | 0 |
| 1998 | 28 | 0 |
| 1999 | 28 | 0 |
| 2000 | 25 | 0 |
| 2001 | 22 | 7 |
| 2002 | 36 | 24 |
| 2003 | 21 | 39 |
| 2004 | 27 | 30 |
| 2005 | 18 | 41 |
| 2006 | 39 | 30 |
| 2007 | 26 | 38 |
| 2008 | 16 | 28 |
| 2009 | 21 | 29 |
| 2010 | 24 | 34 |
| 2011 | 24 | 27 |
| 2012 | 23 | 35 |
| 2013 | 22 | 42 |
| 2014 | 26 | 47 |
| 2015 | 36 | 68 |
| 2016 | 56 | 70 |
| 2017 | 59 | 87 |
| 2018 | 73 | 80 |
| 2019 | 82 | 83 |
| 2020 | 86 | 78 |
| 2021 | 69 | 111 |
| 2022 | 70 | 96 |
| 2023 | 76 | 112 |
| 2024 | 81 | 113 |
| 2025 | 87 | 84 |
| 2026 | 69 | 69 |
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
- Abnormality detection device, abnormality detection method, and non-transitory computer-readable medium storing abnormality detection program29 Sep 2026US 12,748,058 B2Kyoto University
- Method and system of full-field three dimensional displacement measurement via microwave sensing29 Sep 2026US 12,748,059 B2Shanghai Jiao Tong University
- Flow regime classification, water liquid ratio estimation, and salinity estimation systems and methods29 Sep 2026US 12,748,093 B2OneSubsea IP UK Limited
- Two-stage frequency selection method and device for microwave frequency sweep data22 Sep 2026US 12,743,481 B2Zhejiang University
- Method for non-contact ground moisture level estimation at various depths using reflected energy at a work machine17 Sep 2026US 2026/0276560 A1Deere & Company
- Terahertz system and control device10 Sep 2026US 2026/0266742 A1Rohm Co., Ltd.
- Smart wear sensor for slurry-transporting equipment and related methods27 Aug 2026US 2026/0251584 A1Lynkz Instruments Inc.
- Sensor apparatus, information processing apparatus, information processing method, and program27 Aug 2026US 2026/0251585 A1Sony Group Corporation
- Spectrometer and method for detecting a spectrum20 Aug 2026US 2026/0243673 A1
Most cited
By later US patents
- Remote resonant-circuit analyte sensing apparatus with sensing structure and associated method of sensing630US 6,359,444 B1University of Kentucky Research Foundation · 2002
- Detection of fluids in tissue321US 7,122,012 B2Medrad, Inc. · 2006
- Radio frequency process sensing, control, and diagnostics network and system267US 10,118,119 B2CTS Corporation · 2018
- Microwave tomographic spectroscopy system and method236US 5,715,819 AThe Carolinas Heart Institute · 1998
- Apparatus and method for imaging with wavefields using inverse scattering techniques198US 6,005,916 ATechniscan, Inc. · 1999