G03B 21/147
Optical correction of image distortions
Official title: {Optical correction of image distortions, e.g. keystone}
G03B21/147 (Optical correction of image distortions) appears on 568 US grants and 638 published applications in this corpus.
Search patents in G03B- Granted patents
- 568
- Published applications
- 638
- Assignees
- 204
- Inventors
- 1,008
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 7 | 3 |
| 2003 | 3 | 4 |
| 2004 | 3 | 3 |
| 2005 | 1 | 10 |
| 2006 | 3 | 11 |
| 2007 | 12 | 17 |
| 2008 | 2 | 11 |
| 2009 | 9 | 12 |
| 2010 | 9 | 18 |
| 2011 | 14 | 21 |
| 2012 | 9 | 20 |
| 2013 | 11 | 28 |
| 2014 | 26 | 41 |
| 2015 | 34 | 58 |
| 2016 | 45 | 44 |
| 2017 | 59 | 38 |
| 2018 | 52 | 51 |
| 2019 | 50 | 57 |
| 2020 | 43 | 43 |
| 2021 | 52 | 44 |
| 2022 | 37 | 34 |
| 2023 | 26 | 25 |
| 2024 | 26 | 19 |
| 2025 | 15 | 11 |
| 2026 | 13 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Integrated front projection system87US 6,179,426 B23M Innovative Properties Company · 2001
- Image projecting device59US 5,274,406 AAsahi Kogaku Kogyo Kabushiki Kaisha · 1993
- Image projector with reflected light tracking59US 8,282,222 B22012
- Systems and methods for multiplying the image resolution of a pixelated display42US 10,942,430 B2DigiLens Inc. · 2021
- Compact integrated front projection system42US 6,604,829 B23M Innovative Properties Company · 2003