G01N 21/27
Using photo-electric detection
Official title: using photo-electric detection (G01N21/31 takes precedence){; circuits for computing concentration (logarithmic circuits G06G7/24; photometric circuits in general G01J)}
G01N21/27 (Using photo-electric detection) appears on 3,423 US grants and 3,947 published applications in this corpus.
Search patents in G01N- Granted patents
- 3,423
- Published applications
- 3,947
- Assignees
- 1,975
- Inventors
- 8,538
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 16 | 0 |
| 1978 | 15 | 0 |
| 1979 | 7 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 7 | 0 |
| 1983 | 7 | 0 |
| 1984 | 11 | 0 |
| 1985 | 16 | 0 |
| 1986 | 10 | 0 |
| 1987 | 10 | 0 |
| 1988 | 8 | 0 |
| 1989 | 13 | 0 |
| 1990 | 17 | 0 |
| 1991 | 16 | 0 |
| 1992 | 19 | 0 |
| 1993 | 27 | 0 |
| 1994 | 30 | 0 |
| 1995 | 20 | 0 |
| 1996 | 23 | 0 |
| 1997 | 19 | 0 |
| 1998 | 27 | 0 |
| 1999 | 25 | 0 |
| 2000 | 25 | 0 |
| 2001 | 24 | 6 |
| 2002 | 43 | 51 |
| 2003 | 49 | 83 |
| 2004 | 51 | 87 |
| 2005 | 59 | 154 |
| 2006 | 72 | 129 |
| 2007 | 97 | 125 |
| 2008 | 85 | 129 |
| 2009 | 91 | 106 |
| 2010 | 91 | 126 |
| 2011 | 85 | 127 |
| 2012 | 100 | 110 |
| 2013 | 93 | 147 |
| 2014 | 99 | 146 |
| 2015 | 106 | 176 |
| 2016 | 122 | 207 |
| 2017 | 164 | 217 |
| 2018 | 186 | 229 |
| 2019 | 236 | 258 |
| 2020 | 210 | 243 |
| 2021 | 219 | 228 |
| 2022 | 173 | 194 |
| 2023 | 138 | 200 |
| 2024 | 168 | 192 |
| 2025 | 172 | 160 |
| 2026 | 87 | 117 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Raman spectroscopy method and apparatus6 Oct 2026US 12,754,131 B2The University Court of the University of Edinburgh
- Apparatus for illuminating matter29 Sep 2026US 12,746,580 B2Tomra Sorting GmbH
- Method for accumulating microscopic objects, and method for detecting microscopic objects using same29 Sep 2026US 12,748,113 B2University Public Corporation Osaka
- Beam profiler certification and calibration22 Sep 2026US 12,742,726 B2The Boeing Company
- Optical systems and methods for biological analysis15 Sep 2026US 12,736,477 B2Life Technologies Corporation
- Method for developing tissue-specific color chart1 Oct 2026US 2026/0298808 A1Purdue Research Foundation
- Single point analyzer1 Oct 2026US 2026/0298809 A1Tomra Sorting GmbH
- Systems, methods, and compositions for the detection of microbes1 Oct 2026US 2026/0298925 A1SD Systems, Inc.
- Systems and methods for determining crosstalk coefficients24 Sep 2026US 2026/0287498 A1Roche Sequencing Solutions, Inc.
- Field test for determining emulsifier concentrations in drilling fluids24 Sep 2026US 2026/0287572 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Method and apparatus using alternative site glucose determinations to calibrate and maintain noninvasive and implantable analyzers1,598US 6,998,247 B2Sensys Medical, Inc. · 2006
- Manual and automatic probe calibration1,429US 5,758,644 AMasimo Corporation · 1998
- Manual and automatic probe calibration1,177US 6,011,986 AMasimo Corporation · 2000
- Optical probe and positioning wrap1,167US 6,678,543 B2Masimo Corporation · 2004
- Manual and automatic probe calibration1,147US 6,397,091 B2Masimo Corporation · 2002