G01N 2021/551
Retroreflectance
Official title: {Retroreflectance}
G01N2021/551 (Retroreflectance) appears on 44 US grants and 53 published applications in this corpus.
Search patents in G01N- Granted patents
- 44
- Published applications
- 53
- Assignees
- 43
- Inventors
- 98
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 2 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 1 |
| 2012 | 3 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 2 |
| 2015 | 5 | 7 |
| 2016 | 1 | 1 |
| 2017 | 3 | 2 |
| 2018 | 1 | 4 |
| 2019 | 3 | 4 |
| 2020 | 5 | 4 |
| 2021 | 2 | 3 |
| 2022 | 1 | 3 |
| 2023 | 1 | 3 |
| 2024 | 2 | 3 |
| 2025 | 3 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Detection device and measurement apparatus6 Oct 2026US 12,754,134 B2FUJIFILM Corporation
- Gadget for measuring retroreflected signal27 May 2025US 12,313,542 B2Ajou University Industry-Academic Cooperation Foundation
- Methods and apparatuses for monitoring the curing of a photocurable material1 Apr 2025US 12,265,075 B2Corning Incorporated
- Multipass cell25 Feb 2025US 12,235,207 B2Thermo Fisher Scientific (Ecublens) SARL
- Retro-reflectometer for measuring retro-reflectivity of objects in an outdoor environment15 Oct 2024US 12,117,395 B2Waymo LLC
- Retro-reflection measurement method and device13 Aug 2026US 2026/0235512 A1EVERFINE (Shenzhen) Precise Measurement Tech Co., Ltd.
- Retro-reflectometer for measuring retro-reflectivity of objects in an outdoor environment19 Mar 2026US 2026/0079107 A1Waymo LLC
- Gadget for measuring retroreflected signal18 Apr 2024US 2024/0125698 A1Ajou University Industry-Academic Cooperation Foundation
- Detection device and measurement apparatus28 Mar 2024US 2024/0102928 A1FUJIFILM Corporation
- Filter-press filter-cloth damage detection device22 Feb 2024US 2024/0060887 A1Ishigaki Company Limited
Most cited
By later US patents
- System for automated determination of retroreflectivity of road signs and other reflective objects88US 6,674,878 B2Facet Technology Corp. · 2004
- Arrangement for measuring or detecting a change in a retro-reflective element35US 5,666,037 A1997
- System for automated determination of retroreflectivity of road signs and other reflective objects29US 7,043,057 B2Facet Technology Corp. · 2006
- Method and apparatus for measuring retroreflectivity of a reflective layer on a surface28US 4,721,389 APotters Industries, Inc. · 1988
- System for automated determination of retroreflectivity of road signs and other reflective objects26US 7,411,681 B2Facet Technology Corp. · 2008