G02B 5/205
Neutral density filters
Official title: {Neutral density filters}
G02B5/205 (Neutral density filters) appears on 300 US grants and 346 published applications in this corpus.
Search patents in G02B- Granted patents
- 300
- Published applications
- 346
- Assignees
- 224
- Inventors
- 820
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 6 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 2 |
| 2003 | 5 | 8 |
| 2004 | 1 | 11 |
| 2005 | 6 | 10 |
| 2006 | 8 | 6 |
| 2007 | 4 | 12 |
| 2008 | 5 | 10 |
| 2009 | 4 | 13 |
| 2010 | 12 | 9 |
| 2011 | 7 | 7 |
| 2012 | 6 | 9 |
| 2013 | 4 | 6 |
| 2014 | 10 | 19 |
| 2015 | 13 | 21 |
| 2016 | 11 | 17 |
| 2017 | 23 | 29 |
| 2018 | 18 | 26 |
| 2019 | 16 | 18 |
| 2020 | 23 | 17 |
| 2021 | 17 | 23 |
| 2022 | 16 | 24 |
| 2023 | 17 | 22 |
| 2024 | 14 | 17 |
| 2025 | 15 | 5 |
| 2026 | 10 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Image capturing apparatus and mobile cleaning robot4 Aug 2026US 12,701,330 B2eYs3D Microelectronics, Co.
- Glare blocking assembly14 Apr 2026US 12,600,206 B2
- Laminated glass interlayer film and laminated glass17 Mar 2026US 12,576,610 B2Sekisui Chemical Co., Ltd.
- Vehicle display system for nighttime driving17 Mar 2026US 12,579,822 B2GM Global Technology Operations LLC
- Light source and system for and method of fluorescence diagnosis10 Mar 2026US 12,569,124 B2KARL STORZ GmbH&Co.KG
- Display device27 Aug 2026US 2026/0251899 A1Alps Alpine Co., Ltd.
- Optical filter arrangement25 Jun 2026US 2026/0177732 A1Admesy B.V.
- Photographic filter assembly14 May 2026US 2026/0133351 A1Zhongshan City Xingsheng Optical Co., Ltd.
- Imaging apparatus, control method, and storage medium7 May 2026US 2026/0126644 A1Canon Kabushiki Kaisha
- Filter module for imaging apparatus4 Sep 2025US 2025/0280188 A1Panasonic Intellectual Property Management Co., Ltd.
Most cited
By later US patents
- System and method for nanostructure apodization mask for transmitter signal suppression in a duplex telescope129US 8,963,068 B2The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2015
- High transmittance, low emissivity coatings for substrates90US 5,302,449 ACardinal IG Company · 1994
- Optical imaging transmitter with brightness enhancement68US 10,222,475 B2Ouster, Inc. · 2019
- High transmittance, low emissivity coatings for substrates48US 6,524,688 B1Cardinal CG Company · 2003
- Light-polarizing film42US 4,859,039 ASumitomo Chemical Company, Limited · 1989