H04B 10/275
Ring-type networks
H04B10/275 (Ring-type networks) appears on 227 US grants and 188 published applications in this corpus.
Search patents in H04B- Granted patents
- 227
- Published applications
- 188
- Assignees
- 125
- Inventors
- 471
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 3 |
| 2002 | 7 | 4 |
| 2003 | 6 | 9 |
| 2004 | 7 | 8 |
| 2005 | 3 | 10 |
| 2006 | 8 | 9 |
| 2007 | 9 | 9 |
| 2008 | 9 | 8 |
| 2009 | 6 | 6 |
| 2010 | 6 | 6 |
| 2011 | 9 | 8 |
| 2012 | 5 | 9 |
| 2013 | 3 | 3 |
| 2014 | 11 | 3 |
| 2015 | 4 | 12 |
| 2016 | 11 | 9 |
| 2017 | 10 | 14 |
| 2018 | 14 | 6 |
| 2019 | 9 | 9 |
| 2020 | 10 | 7 |
| 2021 | 7 | 9 |
| 2022 | 5 | 5 |
| 2023 | 8 | 12 |
| 2024 | 8 | 5 |
| 2025 | 8 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical access network and its design method4 Aug 2026US 12,700,925 B2NTT, Inc.
- Coexistence module for accommodating optical time domain reflectometry in optical networks21 Jul 2026US 12,689,434 B2CommScope Technologies LLC
- Label distribution protocol (LDP) convergence in ring topologies18 Nov 2025US 12,476,906 B2Ciena Corporation
- Autonomous mining system based on real-time digital video communication that uses ethernet and optical technologies9 Sep 2025US 12,413,309 B2King Abdullah University of Science and Technology
- Optical access network2 Sep 2025US 12,407,416 B2Nippon Telegraph and Telephone Corporation
- Communication method, apparatus, and system, and train15 Jan 2026US 2026/0019156 A1Crrc Qingdao Sifang Co., Ltd.
- Remote optical fiber switching node and its monitoring method9 Oct 2025US 2025/0317201 A1Nippon Telegraph and Telephone Corporation
- System and Method for Implementing Automobile Electronic Control Function, and Automobile10 Jul 2025US 2025/0225864 A1Shenzhen Yinwang Intelligent Technologies Co., Ltd.
- Photonic gateway apparatus6 Mar 2025US 2025/0080266 A1Nippon Telegraph and Telephone Corporation
- Coexistence module for accomodating optical time domain reflectometry in optical networks16 Jan 2025US 2025/0023635 A1CommScope Technologies LLC
Most cited
By later US patents
- Local area network optical fiber data communication278US 4,366,565 A1982
- Photonic home area network99US 5,983,068 A1999
- Optical multichannel system91US 5,680,235 ATelefonaktiebolaget LM Ericsson · 1997
- Methods and systems for distributing fiber optic telecommunications services to local area89US 8,254,740 B2ADC Telecommunications, Inc. · 2012
- Single fiber transceiver and network83US 5,541,759 AMicrosym Computers, Inc. · 1996