A61F 9/065
Use of particular optical filters
Official title: {use of particular optical filters (A61F9/022, A61F9/062 take precedence)}
A61F9/065 (Use of particular optical filters) appears on 226 US grants and 225 published applications in this corpus.
Search patents in A61F- Granted patents
- 226
- Published applications
- 225
- Assignees
- 78
- Inventors
- 299
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 1 |
| 2003 | 4 | 1 |
| 2004 | 3 | 6 |
| 2005 | 7 | 10 |
| 2006 | 1 | 2 |
| 2007 | 4 | 9 |
| 2008 | 3 | 5 |
| 2009 | 3 | 5 |
| 2010 | 4 | 7 |
| 2011 | 4 | 12 |
| 2012 | 10 | 8 |
| 2013 | 5 | 7 |
| 2014 | 9 | 12 |
| 2015 | 9 | 7 |
| 2016 | 2 | 8 |
| 2017 | 3 | 16 |
| 2018 | 5 | 12 |
| 2019 | 10 | 23 |
| 2020 | 16 | 14 |
| 2021 | 18 | 15 |
| 2022 | 9 | 17 |
| 2023 | 12 | 7 |
| 2024 | 11 | 8 |
| 2025 | 7 | 8 |
| 2026 | 7 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical filters affecting color vision in a desired manner and design method thereof by non-linear optimization28 Jul 2026US 12,693,552 B2EnChroma, Inc.
- Protective headwear with airflow14 Jul 2026US 12,677,902 B2Illinois Tool Works Inc.
- Welding information providing apparatus23 Jun 2026US 12,661,269 B2Otos Wing Co., Ltd.
- Camera system and welding information providing device having the same19 May 2026US 12,629,283 B2Otos Wing Co., Ltd.
- Automatic darkening apparatus with integrated magnification lens21 Apr 2026US 12,605,284 B2Lincoln Global.Inc.
- Head-worn optical protection device with lens clamp assembly24 Sep 2026US 2026/0283852 A1Ipg Photonics Corporation
- Welding helmet and auto-darkening filter therefor24 Sep 2026US 2026/0283853 A1
- Welding Protection Device with Haptic Sensing16 Jul 2026US 2026/0199135 A13M Innovative Properties Company
- Auto-darkening laser light filter and welding helmet18 Jun 2026US 2026/0165884 A1Tecmen Electronics Co., Ltd.
- Automatic darkening filter with simplified set-up11 Sep 2025US 2025/0281331 A13M Innovative Properties Company
Most cited
By later US patents
- Automatic liquid-crystal light shutter387US 4,491,390 A1985
- Data display on a welding screen228US 6,734,393 B1Fronius International GmbH · 2004
- Variable transparency electro-optical device178US 5,608,567 AAsulab S. A. · 1997
- Eye protection device for welding helmets169US 5,208,688 AOSD Envizion Company · 1993
- Welding helmet lens assembly167US 4,241,286 A1980