H04Q 3/526
Optical switching systems
Official title: {Optical switching systems}
H04Q3/526 (Optical switching systems) appears on 30 US grants and 4 published applications in this corpus.
Search patents in H04Q- Granted patents
- 30
- Published applications
- 4
- Assignees
- 23
- Inventors
- 52
- Latest grant
- 22 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Optical network, optical transport system, and optical node included therein22 Aug 2023US 11,736,193 B2Nippon Telegraph and Telephone Corporation
- Optical switch and optical routing method and system15 Aug 2023US 11,729,535 B2British Telecommunications Public Ltd.Co.
- Optical reception apparatus, optical transmission apparatus, optical communication system, and skew adjusting method26 Feb 2019US 10,219,049 B2Fujitsu Limited
- Machine learning for link parameter identification in an optical communications system1 Jan 2019US 10,171,161 B1Ciena Corporation
- Optical switch array capable of bidirectional signal transfer between a plurality of terminals13 Jul 1993US 5,227,906 ACanon Kabushiki Kaisha
- Optical switch and optical routing method and system20 Apr 2023US 2023/0124153 A1British Telecommunications Public Ltd.Co.
- Optical Network, Optical Transport System, and Optical Node Included Therein21 Oct 2021US 2021/0328676 A1Nippon Telegraph and Telephone Corporation
- Optical reception apparatus, optical transmission apparatus, optical communication system, and skew adjusting method27 Dec 2018US 2018/0376226 A1Fujitsu Limited
- System and Method for Photonic Switching17 Nov 2016US 2016/0334575 A1Huawei Technologies Co., Ltd.
Most cited
By later US patents
- Optical cross-point switch204US 4,074,142 A1978
- Optical switch for a very large number of channels73US 4,365,863 ALe Materiel Telephonique Thomson-CSF · 1982
- Method and arrangement for controlling a light switch for optical signals60US 4,545,078 ASiemens Aktiengesellschaft · 1985
- Optical switch array capable of bidirectional signal transfer between a plurality of terminals51US 5,227,906 ACanon Kabushiki Kaisha · 1993
- Optical crossbar switching network40US 4,013,000 ABell Telephone Laboratories, Incorporated · 1977