G01N 21/314
With comparison of measurements at specific and non-specific wavelengths
Official title: {with comparison of measurements at specific and non-specific wavelengths (dual wavelength spectrometry G01J3/427)}
G01N21/314 (With comparison of measurements at specific and non-specific wavelengths) appears on 1,843 US grants and 1,683 published applications in this corpus.
Search patents in G01N- Granted patents
- 1,843
- Published applications
- 1,683
- Assignees
- 1,152
- Inventors
- 4,198
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 10 | 0 |
| 1978 | 10 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 17 | 0 |
| 1982 | 11 | 0 |
| 1983 | 12 | 0 |
| 1984 | 13 | 0 |
| 1985 | 18 | 0 |
| 1986 | 18 | 0 |
| 1987 | 23 | 0 |
| 1988 | 21 | 0 |
| 1989 | 34 | 0 |
| 1990 | 17 | 0 |
| 1991 | 31 | 0 |
| 1992 | 31 | 0 |
| 1993 | 23 | 0 |
| 1994 | 29 | 0 |
| 1995 | 20 | 0 |
| 1996 | 20 | 0 |
| 1997 | 10 | 0 |
| 1998 | 32 | 0 |
| 1999 | 19 | 0 |
| 2000 | 28 | 0 |
| 2001 | 25 | 6 |
| 2002 | 22 | 30 |
| 2003 | 28 | 38 |
| 2004 | 29 | 53 |
| 2005 | 30 | 38 |
| 2006 | 30 | 55 |
| 2007 | 33 | 55 |
| 2008 | 44 | 56 |
| 2009 | 50 | 55 |
| 2010 | 32 | 46 |
| 2011 | 42 | 56 |
| 2012 | 40 | 56 |
| 2013 | 57 | 92 |
| 2014 | 51 | 62 |
| 2015 | 65 | 80 |
| 2016 | 69 | 64 |
| 2017 | 62 | 63 |
| 2018 | 47 | 77 |
| 2019 | 94 | 96 |
| 2020 | 78 | 89 |
| 2021 | 81 | 99 |
| 2022 | 76 | 119 |
| 2023 | 74 | 98 |
| 2024 | 95 | 81 |
| 2025 | 87 | 67 |
| 2026 | 31 | 52 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 21/3151Using two sources of radiation of different wavelengths412
- G01N 2021/3155Measuring in two spectral rangesIndexing code274
- G01N 2021/3181Using ledsIndexing code239
- G01N 2021/317Special constructive featuresIndexing code207
- G01N 2021/3144For oxymetryIndexing code158
- G01N 2021/3148Using three or more wavelengthsIndexing code140
- G01N 2021/3166Using separate detectors and filtersIndexing code117
- G01N 2021/3159Special features of multiplexing circuitsIndexing code26
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Most cited
By later US patents
- Manual and automatic probe calibration1,429US 5,758,644 AMasimo Corporation · 1998
- Implantable sensor and system for in vivo measurement and control of fluid constituent levels1,362US 6,049,727 AAnimas Corporation · 2000
- Optical filter for spectroscopic measurement and method of producing the optical filter1,209US 5,760,910 AMasimo Corporation · 1998
- Signal processing apparatus1,192US 6,650,917 B2Masimo Corporation · 2003
- Manual and automatic probe calibration1,177US 6,011,986 AMasimo Corporation · 2000