G01N 2021/3181
Using leds
Official title: {using LEDs}
G01N2021/3181 (Using leds) appears on 239 US grants and 234 published applications in this corpus.
Search patents in G01N- Granted patents
- 239
- Published applications
- 234
- Assignees
- 209
- Inventors
- 655
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 8 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 1 |
| 2004 | 3 | 5 |
| 2005 | 2 | 2 |
| 2006 | 4 | 5 |
| 2007 | 2 | 3 |
| 2008 | 1 | 4 |
| 2009 | 4 | 5 |
| 2010 | 0 | 6 |
| 2011 | 6 | 5 |
| 2012 | 8 | 7 |
| 2013 | 5 | 7 |
| 2014 | 4 | 1 |
| 2015 | 4 | 8 |
| 2016 | 8 | 10 |
| 2017 | 8 | 10 |
| 2018 | 3 | 12 |
| 2019 | 15 | 17 |
| 2020 | 18 | 16 |
| 2021 | 15 | 26 |
| 2022 | 17 | 30 |
| 2023 | 14 | 19 |
| 2024 | 19 | 18 |
| 2025 | 22 | 6 |
| 2026 | 4 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Illuminator systems having light emitting diodes with UV activation30 Jun 2026US 12,669,437 B2Bio-Rad Laboratories, Inc.
- Pressure tuned infrared light emitting diode for downhole spectroscopy19 May 2026US 12,631,111 B2Baker Hughes Oilfield Operations LLC
- Moisture detecting apparatus for recording material and image forming apparatus10 Feb 2026US 12,546,714 B2Canon Kabushiki Kaisha
- Absorbance spectroscopy analyzer and method of use27 Jan 2026US 12,535,357 B2Siemens Healthcare Diagnostics Inc.
- Apparatus for the measurement of light transmittance through a liquid sample using multiple LED light sources18 Nov 2025US 12,474,256 B2Real Tech Holdings Inc.
- Apparatus, system and method for detecting biomarkers16 Apr 2026US 2026/0101991 A1Colgate-Palmolive Company
- Absorbance spectroscopy analyzer and method of use16 Apr 2026US 2026/0104290 A1Siemens Healthcare Diagnostics Inc.
- Wearable ring-type sensor devices for monitoring health and wellness conditions9 Apr 2026US 2026/0096777 A1
- Systems and methods for aqueous nitrate detection9 Apr 2026US 2026/0098802 A1University of Miami
- System and method for in-line optical sensing of hydrogen peroxide5 Mar 2026US 2026/0063550 A1CardioQuip, LLC
Most cited
By later US patents
- Pulse oximeter with improved accuracy and response time484US 5,190,038 ANovametrix Medical Systems, Inc. · 1993
- Methods and devices for detecting intensity of light with translucent detector471US 10,750,984 B2Cercacor Laboratories, Inc. · 2020
- Optical sensor for pulse oximeter337US 4,880,304 ANippon Colin Co., Ltd. · 1989
- Pathlength corrected oximeter and the like327US 5,564,417 ANon-Invasive Technology, Inc. · 1996
- Non-invasive oximeter and method295US 4,824,242 ASensormedics Corporation · 1989