G02F 2202/40
Materials having a particular birefringence, retardation
G02F2202/40 (Materials having a particular birefringence, retardation) appears on 509 US grants and 494 published applications in this corpus.
Search patents in G02F- Granted patents
- 509
- Published applications
- 494
- Assignees
- 195
- Inventors
- 1,095
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 3 | 0 |
| 1991 | 8 | 0 |
| 1992 | 5 | 0 |
| 1993 | 9 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 12 | 0 |
| 1999 | 8 | 0 |
| 2000 | 13 | 0 |
| 2001 | 12 | 1 |
| 2002 | 8 | 17 |
| 2003 | 21 | 22 |
| 2004 | 18 | 29 |
| 2005 | 15 | 19 |
| 2006 | 21 | 22 |
| 2007 | 15 | 35 |
| 2008 | 11 | 40 |
| 2009 | 26 | 61 |
| 2010 | 32 | 43 |
| 2011 | 45 | 16 |
| 2012 | 33 | 23 |
| 2013 | 20 | 20 |
| 2014 | 10 | 17 |
| 2015 | 19 | 15 |
| 2016 | 14 | 19 |
| 2017 | 13 | 5 |
| 2018 | 13 | 15 |
| 2019 | 15 | 16 |
| 2020 | 11 | 16 |
| 2021 | 18 | 22 |
| 2022 | 11 | 4 |
| 2023 | 13 | 8 |
| 2024 | 7 | 7 |
| 2025 | 6 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical device21 Apr 2026US 12,607,891 B2Murata Manufacturing Co., Ltd.
- Optical element and display device7 Apr 2026US 12,596,217 B2Japan Display Inc.
- Light modulating device and automobile18 Nov 2025US 12,474,610 B2LG Chem.Ltd.
- Photoluminescence device and display panel including the same19 Aug 2025US 12,392,944 B2Samsung Display Co., Ltd.
- Retardation film and method for producing the same22 Jul 2025US 12,366,694 B2Osaka Gas Chemicals Co., Ltd.
- Polarization compensation for wire grid polarizer of head-mounted display system21 May 2026US 2026/0140383 A1Valve Corporation
- Photoluminescence device and display panel including the same9 Oct 2025US 2025/0314812 A1Samsung Display Co., Ltd.
- Photoluminescence device and display panel including the same17 Oct 2024US 2024/0345298 A1Samsung Display Co., Ltd.
- Polymer dispersed liquid crystal film and manufacturing method therefor4 Jul 2024US 2024/0219764 A1Nitto Denko Corporation
- Optical element and display device6 Jun 2024US 2024/0184163 A1Sharp Display Technology Corporation
Most cited
By later US patents
- Optical switching apparatus182US 7,058,252 B2Ocuity Limited · 2006
- Active matrix liquid crystal display element and projection type active matrix liquid crystal display device172US 5,150,232 AAsahi Glass Company, Limited · 1992
- Active matrix liquid crystal display element and projection type active matrix liquid crystal display device156US 5,386,306 AAsahi Glass Company, Limited · 1995
- Liquid crystal display device140US 6,801,283 B2Advanced Display Inc. · 2004
- Liquid crystal display device129US 5,018,839 AKabushiki Kaisha Toshiba · 1991