H04N 9/3197
Using light modulating optical valves
Official title: {using light modulating optical valves}
H04N9/3197 (Using light modulating optical valves) appears on 358 US grants and 391 published applications in this corpus.
Search patents in H04N- Granted patents
- 358
- Published applications
- 391
- Assignees
- 119
- Inventors
- 543
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 3 |
| 2006 | 0 | 1 |
| 2007 | 3 | 13 |
| 2008 | 4 | 10 |
| 2009 | 3 | 20 |
| 2010 | 6 | 18 |
| 2011 | 5 | 31 |
| 2012 | 7 | 23 |
| 2013 | 10 | 37 |
| 2014 | 42 | 37 |
| 2015 | 77 | 20 |
| 2016 | 44 | 36 |
| 2017 | 19 | 17 |
| 2018 | 24 | 13 |
| 2019 | 17 | 22 |
| 2020 | 24 | 33 |
| 2021 | 23 | 14 |
| 2022 | 19 | 10 |
| 2023 | 9 | 7 |
| 2024 | 6 | 13 |
| 2025 | 5 | 7 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- High intensity lighting projectors319US 5,282,121 AVari-Lite, Inc. · 1994
- Systems and methods for optically projecting three-dimensional text, images and/or symbols onto three-dimensional objects153US 8,610,761 B2Prohectionworks, Inc. · 2013
- Systems and methods for optically projecting three-dimensional text, images and/or symbols onto three-dimensional objects131US 9,332,251 B2Delta Sigma Company · 2016
- Active matrix LCD image projection system95US 5,012,274 A1991
- Portable presentation system and methods for use therewith71US 7,948,448 B2Polyvision Corporation · 2011