F21S 41/64
By changing their light transmissivity
Official title: by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
F21S41/64 (By changing their light transmissivity) appears on 285 US grants and 317 published applications in this corpus.
Search patents in F21S- Granted patents
- 285
- Published applications
- 317
- Assignees
- 116
- Inventors
- 529
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 3 |
| 2003 | 2 | 6 |
| 2004 | 0 | 2 |
| 2005 | 3 | 3 |
| 2006 | 2 | 3 |
| 2007 | 1 | 2 |
| 2008 | 0 | 5 |
| 2009 | 1 | 2 |
| 2010 | 0 | 1 |
| 2011 | 0 | 12 |
| 2012 | 5 | 5 |
| 2013 | 5 | 4 |
| 2014 | 5 | 9 |
| 2015 | 8 | 13 |
| 2016 | 6 | 15 |
| 2017 | 8 | 14 |
| 2018 | 18 | 33 |
| 2019 | 37 | 49 |
| 2020 | 54 | 37 |
| 2021 | 27 | 19 |
| 2022 | 22 | 19 |
| 2023 | 20 | 22 |
| 2024 | 16 | 14 |
| 2025 | 12 | 18 |
| 2026 | 15 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Decorative assembly and vehicle6 Oct 2026US 12,753,898 B2Iris Optronics Co., Ltd.
- Lamp with steerable beam1 Sep 2026US 12,723,724 B2GM Global Technology Operations LLC
- Lighting device for a motor vehicle11 Aug 2026US 12,704,236 B2Hella GmbH & Co. KGaA
- Headlamp for a vehicle4 Aug 2026US 12,698,878 B2Hella GmbH & Co. KGaA
- Lighting and signalling device for a motor vehicle21 Jul 2026US 12,686,323 B2Valeo Vision
- Light assembly, lighting device and vehicle8 Oct 2026US 2026/0309296 A1Motherson Innovations Company Limited
- Vehicle headlamp apparatus20 Aug 2026US 2026/0241850 A1Koito Manufacturing Co., Ltd.
- Liquid Crystal System and Lighting Device for a Vehicle9 Jul 2026US 2026/0194773 A1Hella GmbH & Co. KGaA
- Illumination device for vehicles2 Jul 2026US 2026/0185674 A1Hella GmbH & Co. KGaA
- Adaptive lighting system16 Apr 2026US 2026/0104150 A1Tesla, Inc.
Most cited
By later US patents
- Headlamp control to prevent glare143US 6,861,809 B2Gentex Corporation · 2005
- Taillight apparatus and method of making64US 6,902,307 B2Illume, L.L.C. · 2005
- Vehicle headlamp61US 4,985,816 ANissan Motor Co., Ltd. · 1991
- Lamp masking method and apparatus56US 6,558,026 B2Illume, L.L.C. · 2003
- Array of luminescent elements53US 8,941,566 B23M Innovative Properties Company · 2015