H04Q 2011/0009
Using wavelength filters
Official title: {using wavelength filters}
H04Q2011/0009 (Using wavelength filters) appears on 239 US grants and 178 published applications in this corpus.
Search patents in H04Q- Granted patents
- 239
- Published applications
- 178
- Assignees
- 139
- Inventors
- 536
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 10 | 0 |
| 1996 | 12 | 0 |
| 1997 | 6 | 0 |
| 1998 | 21 | 0 |
| 1999 | 6 | 0 |
| 2000 | 9 | 0 |
| 2001 | 8 | 6 |
| 2002 | 9 | 14 |
| 2003 | 14 | 11 |
| 2004 | 7 | 12 |
| 2005 | 9 | 5 |
| 2006 | 8 | 5 |
| 2007 | 10 | 3 |
| 2008 | 5 | 1 |
| 2009 | 4 | 4 |
| 2010 | 3 | 4 |
| 2011 | 0 | 3 |
| 2012 | 2 | 4 |
| 2013 | 4 | 2 |
| 2014 | 3 | 4 |
| 2015 | 4 | 14 |
| 2016 | 10 | 16 |
| 2017 | 9 | 18 |
| 2018 | 11 | 5 |
| 2019 | 13 | 7 |
| 2020 | 5 | 5 |
| 2021 | 9 | 9 |
| 2022 | 4 | 5 |
| 2023 | 2 | 9 |
| 2024 | 2 | 6 |
| 2025 | 7 | 2 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus and method for maintaining wavelength interval of light sources24 Mar 2026US 12,587,282 B2Electronics and Telecommunications Research Institute
- Optical communication device that transmits WDM signal and transmission control method24 Feb 2026US 12,562,832 B21FINITY Inc.
- Wavelength selective switching apparatus and related method20 Jan 2026US 12,532,094 B2Huawei Technologies Co., Ltd.
- Integrated CMOS photonic and electronic WDM communication system using optical frequency comb generators28 Oct 2025US 12,457,045 B2Ayar Labs, Inc.
- Wavelength multiplexer/demultiplexer14 Oct 2025US 12,442,983 B2Sumitomo Electric Industries, Ltd.
- Optical transmission system, control apparatus and control method13 Aug 2026US 2026/0238346 A1NTT, Inc.
- Network architecture6 Aug 2026US 2026/0230732 A1UCL Business PLC
- Network architecture9 Jul 2026US 2026/0197566 A1UCL Business PLC
- Integrated CMOS Photonic and Electronic WDM Communication System Using Optical Frequency Comb Generators5 Feb 2026US 2026/0039397 A1Ayar Labs, Inc.
- Optical communication apparatus, optical communication system and transmission method24 Jul 2025US 2025/0240097 A1Nippon Telegraph and Telephone Corporation
Most cited
By later US patents
- Non-blocking optical cross-connect structure for telecommunications network164US 5,627,925 ALucent Technologies Inc. · 1997
- Optical routing using a star switching fabric125US 7,263,288 B1Cheetah Omni, LLC · 2007
- Large fault tolerant packet switch particularly suited for asynchronous transfer mode (ATM) communication122US 5,130,984 ABell Communications Research, Inc. · 1992
- Optical cross-connect module93US 5,774,245 AWorldCom Network Services, Inc. · 1998
- All fiber wavelength selective optical switch82US 5,446,809 AUnited Technologies Corporation · 1995