G01N 21/29
Using visual detection
Official title: using visual detection (G01N21/31 takes precedence)
G01N21/29 (Using visual detection) appears on 233 US grants and 251 published applications in this corpus.
Search patents in G01N- Granted patents
- 233
- Published applications
- 251
- Assignees
- 231
- Inventors
- 697
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 5 |
| 2003 | 2 | 1 |
| 2004 | 2 | 4 |
| 2005 | 2 | 5 |
| 2006 | 3 | 5 |
| 2007 | 7 | 2 |
| 2008 | 1 | 6 |
| 2009 | 1 | 3 |
| 2010 | 5 | 6 |
| 2011 | 0 | 6 |
| 2012 | 8 | 10 |
| 2013 | 6 | 11 |
| 2014 | 7 | 7 |
| 2015 | 7 | 18 |
| 2016 | 9 | 10 |
| 2017 | 11 | 14 |
| 2018 | 14 | 21 |
| 2019 | 13 | 12 |
| 2020 | 12 | 17 |
| 2021 | 8 | 18 |
| 2022 | 10 | 16 |
| 2023 | 13 | 15 |
| 2024 | 13 | 18 |
| 2025 | 13 | 10 |
| 2026 | 9 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for testing blood29 Sep 2026US 12,748,041 B2Siemens Healthcare Diagnostics Inc.
- Air quality measuring device22 Sep 2026US 12,742,727 B2Samsung Electronics Co., Ltd.
- Systems and methods for detecting properties relating to building components14 Jul 2026US 12,680,947 B1United Services Automobile Association (USAA)
- Methods and kits for rapid, colormetric beryllium detection30 Jun 2026US 12,669,441 B2Consolidated Nuclear Security, LLC
- Rapid diagnostic kit reader16 Jun 2026US 12,656,263 B2Electronics and Telecommunications Research Institute
- Methods and kits for rapid, colorimetric beryllium detection8 Oct 2026US 2026/0309633 A1Consolidated Nuclear Security, LLC
- Detection method using hrpzyme24 Sep 2026US 2026/0286450 A1Delaware State University
- Field test for determining emulsifier concentrations in drilling fluids24 Sep 2026US 2026/0287572 A1Halliburton Energy Services.Inc.
- Systems and methods for detecting pesticide resistance27 Aug 2026US 2026/0250757 A1Clarke Mosquito Control Products, Inc.
- Saliva Based System and Method for Detecting VOCs, General Health Issues, and Disease States27 Aug 2026US 2026/0251557 A1Orthonu, LLC
Most cited
By later US patents
- Assay kit including an analyte test strip and a color comparator97US 4,877,580 ATechnimed Corporation · 1989
- Color-encoding and in-situ interrogation of matrix-coupled chemical compounds85US 7,083,914 B2BioArray Solutions, Ltd. · 2006
- Compact sanitary urinalysis unit73US 4,473,530 A1984
- Test swab cartridge type device and method for detecting lead and cadmium69US 5,039,618 AHybriVet Systems, Inc. · 1991
- Method and kit having layered device for detecting biological component by interference color63US 4,820,649 ATeijin Limited · 1989