G01N 21/88
Investigating the presence of flaws or contamination
G01N21/88 (Investigating the presence of flaws or contamination) appears on 15,352 US grants and 15,755 published applications in this corpus.
Search patents in G01N- Granted patents
- 15,352
- Published applications
- 15,755
- Assignees
- 5,171
- Inventors
- 30,726
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 66 | 0 |
| 1977 | 57 | 0 |
| 1978 | 41 | 0 |
| 1979 | 37 | 0 |
| 1980 | 51 | 0 |
| 1981 | 68 | 0 |
| 1982 | 37 | 0 |
| 1983 | 51 | 0 |
| 1984 | 62 | 0 |
| 1985 | 72 | 0 |
| 1986 | 61 | 0 |
| 1987 | 112 | 0 |
| 1988 | 88 | 0 |
| 1989 | 99 | 0 |
| 1990 | 115 | 0 |
| 1991 | 118 | 0 |
| 1992 | 97 | 0 |
| 1993 | 113 | 0 |
| 1994 | 108 | 0 |
| 1995 | 156 | 0 |
| 1996 | 121 | 0 |
| 1997 | 135 | 0 |
| 1998 | 204 | 0 |
| 1999 | 185 | 0 |
| 2000 | 204 | 0 |
| 2001 | 208 | 93 |
| 2002 | 210 | 329 |
| 2003 | 364 | 340 |
| 2004 | 300 | 422 |
| 2005 | 309 | 451 |
| 2006 | 370 | 487 |
| 2007 | 359 | 487 |
| 2008 | 386 | 497 |
| 2009 | 366 | 497 |
| 2010 | 402 | 468 |
| 2011 | 366 | 421 |
| 2012 | 381 | 477 |
| 2013 | 359 | 528 |
| 2014 | 421 | 619 |
| 2015 | 503 | 652 |
| 2016 | 573 | 655 |
| 2017 | 639 | 668 |
| 2018 | 626 | 777 |
| 2019 | 751 | 859 |
| 2020 | 849 | 916 |
| 2021 | 677 | 887 |
| 2022 | 674 | 908 |
| 2023 | 665 | 865 |
| 2024 | 752 | 914 |
| 2025 | 826 | 849 |
| 2026 | 558 | 689 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 21/95Characterised by the material or shape of the object to be examined9,563
- G01N 21/8806Specially adapted optical and illumination features3,236
- G01N 21/8851Scan or image signal processing specially adapted therefor2,638
- G01N 21/89In moving material1,796
- G01N 21/94Investigating contamination1,686
- G01N 21/90In a container or its contents1,034
- G01N 21/8803Visual inspection483
- G01N 21/93Detection standards352
All 9 subgroupsShow fewer
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Most cited
By later US patents
- System for detecting injection holding material1,074US 6,943,348 B1Masimo Corporation · 2005
- Apparatus and method providing substantially two-dimensionally uniform irradiation542US 6,649,921 B1Fusion UV Systems, Inc. · 2003
- Device and system for processing image data representing bar codes540US 8,720,783 B2Hand Held Products, Inc. · 2014
- Defect detection system406US 4,314,763 ARCA Corporation · 1982
- Particle detection method and apparatus362US 4,655,592 AHamamatsu Systems, Inc. · 1987