G01N 21/896
Optical defects in or on transparent materials
Official title: Optical defects in or on transparent materials, e.g. distortion, surface flaws {in conveyed flat sheet or rod (for other objects G01N21/958)}
G01N21/896 (Optical defects in or on transparent materials) appears on 247 US grants and 248 published applications in this corpus.
Search patents in G01N- Granted patents
- 247
- Published applications
- 248
- Assignees
- 191
- Inventors
- 629
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 5 | 3 |
| 2003 | 6 | 5 |
| 2004 | 4 | 7 |
| 2005 | 7 | 7 |
| 2006 | 8 | 10 |
| 2007 | 4 | 14 |
| 2008 | 13 | 6 |
| 2009 | 5 | 2 |
| 2010 | 8 | 12 |
| 2011 | 6 | 10 |
| 2012 | 7 | 12 |
| 2013 | 2 | 12 |
| 2014 | 10 | 10 |
| 2015 | 8 | 13 |
| 2016 | 6 | 10 |
| 2017 | 12 | 9 |
| 2018 | 12 | 20 |
| 2019 | 16 | 16 |
| 2020 | 13 | 14 |
| 2021 | 6 | 15 |
| 2022 | 13 | 11 |
| 2023 | 6 | 8 |
| 2024 | 11 | 10 |
| 2025 | 7 | 4 |
| 2026 | 4 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inspection apparatus, recording medium, and inspection system25 Aug 2026US 12,716,849 B2Konica Minolta, Inc.
- Apparatus for measuring sheet-like workpieces, in particular flat glass panes or insulating glass elements31 Mar 2026US 12,590,791 B2Lisec Austria GmbH
- Method and system for discriminating defects present on a frontside from defects present on a backside of a transparent substrate31 Mar 2026US 12,590,905 B2Unity Semiconductor Corporation
- Apparatus and method for inspecting a glass sheet17 Mar 2026US 12,578,282 B2Corning Incorporated
- Device for inspecting the surface of a transparent object, and corresponding method16 Dec 2025US 12,498,331 B2Isra Vision AG
- Measuring of surface deformations on glass surfaces1 Oct 2026US 2026/0298838 A1Viprotron GmbH
- Device for inspecting a planar or web-shaped object6 Aug 2026US 2026/0227341 A1Isra Vision AG
- Device for determining optical properties of an optically transparent substrate, and coating system30 Jul 2026US 2026/0219203 A1BüHler Alzenau GmbH
- Systems and methods for testing optical plates16 Jul 2026US 2026/0202351 A1Lumus Ltd.
- Glass tube processing parameter detection system, method and apparatus18 Jun 2026US 2026/0168938 A1China Building Materials Academy Co., Ltd.
Most cited
By later US patents
- Apparatus and method for characterizing defects in a transparent substrate84US 7,567,344 B2Corning Incorporated · 2009
- Film scanner with dust and scratch correction by use of dark-field illumination74US 5,969,372 AHewlett-Packard Company · 1999
- Thin film thickness monitoring with the intensity of reflected light measured at at least two discrete monitoring wavelengths67US 5,396,080 AGlaverbel · 1995
- Defect inspecting apparatus using multiple color light to detect defects60US 5,072,128 ANikon Corporation · 1991
- Defect detection lighting system and methods for large glass sheets51US 7,551,274 B1Lite Sentry Corporation · 2009