G02F 2201/305
Diffraction grating
Official title: diffraction grating
G02F2201/305 (Diffraction grating) appears on 350 US grants and 338 published applications in this corpus.
Search patents in G02F- Granted patents
- 350
- Published applications
- 338
- Assignees
- 187
- Inventors
- 753
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 9 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 2 |
| 2002 | 7 | 13 |
| 2003 | 13 | 7 |
| 2004 | 12 | 18 |
| 2005 | 9 | 7 |
| 2006 | 6 | 4 |
| 2007 | 7 | 15 |
| 2008 | 14 | 9 |
| 2009 | 6 | 11 |
| 2010 | 6 | 12 |
| 2011 | 4 | 6 |
| 2012 | 9 | 13 |
| 2013 | 7 | 10 |
| 2014 | 10 | 5 |
| 2015 | 9 | 11 |
| 2016 | 8 | 10 |
| 2017 | 14 | 13 |
| 2018 | 3 | 36 |
| 2019 | 23 | 23 |
| 2020 | 27 | 24 |
| 2021 | 26 | 16 |
| 2022 | 23 | 27 |
| 2023 | 18 | 19 |
| 2024 | 12 | 14 |
| 2025 | 19 | 7 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Spectroscopic system15 Sep 2026US 12,736,402 B2FUJIFILM Corporation
- Liquid crystal grating and display device11 Aug 2026US 12,704,754 B2Shanghai Tianma Microelectronics Co., Ltd.
- Optical semiconductor device and optical control apparatus27 Jan 2026US 12,535,713 B2Mitsubishi Electric Corporation
- Waveguide light multiplexer using crossed gratings23 Dec 2025US 12,504,667 B2Magic Leap, Inc.
- Display screen having a variable relative luminance distribution curve18 Nov 2025US 12,474,606 B2siOPTICA GmbH
- Method for controlling refractive index of planar waveguide20 Aug 2026US 2026/0244068 A1Dispelix Oy
- Solid state optical switching engine20 Aug 2026US 2026/0244072 A1II-Vi Delaware, Inc.
- Diffractive optical waveguide display apparatus18 Jun 2026US 2026/0169287 A1Nanchang Virtual Reality Research Institute Co., Ltd.
- Photonic integrated circuit and methods related to the photonic integrated circuit4 Jun 2026US 2026/0153758 A1Tower Semiconductor Ltd.
- Photonic integrated circuit and methods related to the photonic integrated circuit4 Jun 2026US 2026/0153759 A1Tower Semiconductor Ltd.
Most cited
By later US patents
- Optical displays419US 8,233,204 B1Rockwell Collins, Inc. · 2012
- Display panel with electrically-controlled waveguide-routing299US 5,544,268 ADeacon Research · 1996
- Display panel with electrically-controlled waveguide-routing291US 6,522,794 B1Gemfire Corporation · 2003
- Polymer dispersed liquid crystal panel with diffraction grating232US 5,299,289 AMatsushita Electric Industrial Co., Ltd. · 1994
- Reflective optically active diffractive device217US 5,825,448 AKent State University · 1998