G02B 5/204
In which spectral selection is performed by means of a conductive grid
Official title: {in which spectral selection is performed by means of a conductive grid or array, e.g. frequency selective surfaces (for use with wavelengths longer than the infrared light H01Q15/0006)}
G02B5/204 (In which spectral selection is performed by means of a conductive grid) appears on 169 US grants and 185 published applications in this corpus.
Search patents in G02B- Granted patents
- 169
- Published applications
- 185
- Assignees
- 143
- Inventors
- 430
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 3 |
| 2004 | 1 | 4 |
| 2005 | 3 | 3 |
| 2006 | 3 | 5 |
| 2007 | 4 | 6 |
| 2008 | 2 | 3 |
| 2009 | 5 | 7 |
| 2010 | 5 | 10 |
| 2011 | 5 | 2 |
| 2012 | 3 | 8 |
| 2013 | 4 | 8 |
| 2014 | 6 | 8 |
| 2015 | 3 | 5 |
| 2016 | 9 | 11 |
| 2017 | 10 | 21 |
| 2018 | 10 | 8 |
| 2019 | 11 | 12 |
| 2020 | 10 | 6 |
| 2021 | 10 | 15 |
| 2022 | 13 | 16 |
| 2023 | 10 | 11 |
| 2024 | 9 | 6 |
| 2025 | 10 | 4 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Switchable resonant filter for optical radiation262US 5,231,532 ATexas Instruments Incorporated · 1993
- High pass optical filter108US 5,483,387 AHoneywell Inc. · 1996
- Enhanced optical transmission apparatus with improved inter-surface coupling103US 6,285,020 B1NEC Research Institute, Inc. · 2001
- Enhanced optical transmission apparatus utilizing metal films having apertures and periodic surface topography100US 6,236,033 B1NEC Research Institute, Inc. · 2001
- Method of manufacturing a perforated workpiece83US 5,262,021 ASiemens Aktiengesellschaft · 1993