G01N 21/45
Using interferometric methods
Official title: using interferometric methods; using Schlieren methods
G01N21/45 (Using interferometric methods) appears on 995 US grants and 1,133 published applications in this corpus.
Search patents in G01N- Granted patents
- 995
- Published applications
- 1,133
- Assignees
- 707
- Inventors
- 2,570
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 10 | 0 |
| 1992 | 6 | 0 |
| 1993 | 11 | 0 |
| 1994 | 9 | 0 |
| 1995 | 9 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 4 | 0 |
| 2000 | 8 | 0 |
| 2001 | 12 | 3 |
| 2002 | 7 | 10 |
| 2003 | 10 | 17 |
| 2004 | 14 | 18 |
| 2005 | 10 | 28 |
| 2006 | 18 | 29 |
| 2007 | 22 | 39 |
| 2008 | 25 | 29 |
| 2009 | 29 | 40 |
| 2010 | 22 | 36 |
| 2011 | 20 | 31 |
| 2012 | 28 | 40 |
| 2013 | 28 | 44 |
| 2014 | 30 | 35 |
| 2015 | 28 | 44 |
| 2016 | 38 | 42 |
| 2017 | 39 | 44 |
| 2018 | 31 | 60 |
| 2019 | 62 | 61 |
| 2020 | 54 | 74 |
| 2021 | 54 | 81 |
| 2022 | 68 | 79 |
| 2023 | 55 | 77 |
| 2024 | 42 | 69 |
| 2025 | 67 | 55 |
| 2026 | 51 | 48 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Observation device and observation method29 Sep 2026US 12,748,047 B2Hamamatsu Photonics K.K.
- Optical sensor and physical quantity measurement device having a sensor head firmly bonded to a base15 Sep 2026US 12,736,471 B2Nagano Keiki Co., Ltd.
- Defect inspection device8 Sep 2026US 12,730,065 B2Hitachi High-Tech Corporation
- Method for three-dimensional (3D) image calibration for a spectral domain optical coherence tomography (OCT) system8 Sep 2026US 12,730,066 B2Leica Microsystems Nc, Inc.
- Optical test apparatus and optical test method8 Sep 2026US 12,730,253 B2Kabushiki Kaisha Toshiba
- Interference observation device and interference observation method8 Oct 2026US 2026/0309643 A1Hamamatsu Photonics K.K.
- Quantum absorption spectroscopy method and quantum absorption spectroscopy system1 Oct 2026US 2026/0298819 A1Kyoto University
- Waveguide for the analysis of biological samples24 Sep 2026US 2026/0287816 A1Bialoom Ltd
- Device for amplifying a signal in self-reference quantitative phase imaging3 Sep 2026US 2026/0259137 A1Centre National De La Recherche Scientifique
- Material sensitive lidar27 Aug 2026US 2026/0251762 A1Nokia Technologies Oy
Most cited
By later US patents
- Method and apparatus for determining glucose concentration in a biological sample429US 5,710,630 ABoehringer Mannheim GmbH · 1998
- Low coherence interferometry for detecting and characterizing plaques257US 7,242,480 B2Medeikon Corporation · 2007
- Non-invasive method and low-coherence apparatus system analysis and process control245US 6,738,144 B1University of Central Florida · 2004
- Low coherence interferometry for detecting and characterizing plaques245US 7,190,464 B2Medeikon Corporation · 2007
- Apparatus and method for measuring refractive index203US 4,571,082 A1986