H04B 10/2755
Ring-type networks with a headend
Official title: {Ring-type networks with a headend}
H04B10/2755 (Ring-type networks with a headend) appears on 53 US grants and 39 published applications in this corpus.
Search patents in H04B- Granted patents
- 53
- Published applications
- 39
- Assignees
- 40
- Inventors
- 109
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 3 | 1 |
| 2003 | 2 | 2 |
| 2004 | 2 | 0 |
| 2005 | 1 | 6 |
| 2006 | 1 | 4 |
| 2007 | 1 | 2 |
| 2008 | 3 | 2 |
| 2009 | 2 | 0 |
| 2010 | 1 | 2 |
| 2011 | 3 | 3 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 3 |
| 2016 | 1 | 1 |
| 2017 | 3 | 2 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 3 |
| 2021 | 2 | 1 |
| 2022 | 3 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Optical access network2 Sep 2025US 12,407,416 B2Nippon Telegraph and Telephone Corporation
- System and method for multimachine phase synchronization based on optical fiber transmission15 Apr 2025US 12,278,697 B2Ild Electronic Co., Ltd.
- Optical communication system and master station16 Jul 2024US 12,040,831 B2Nippon Telegraph and Telephone Corporation
- System and methods for coherent optics based daisy-chaining8 Aug 2023US 11,722,219 B2Cable Television Laboratories, Inc.
- System and methods for coherent optics based daisy-chaining9 Aug 2022US 11,411,649 B2Cable Television Laboratories, Inc.
- System and method for multimachine phase synchronization based on optical fiber transmission17 Oct 2024US 2024/0348359 A1Ild Electronic Co., Ltd.
- Optical access network22 Feb 2024US 2024/0063911 A1Nippon Telegraph and Telephone Corporation
- Optical communication system and master station11 May 2023US 2023/0142562 A1Nippon Telegraph and Telephone Corporation
- System and methods for coherent optics based daisy-chaining1 Dec 2022US 2022/0385359 A1Cable Television Laboratories, Inc.
- In-vehicle optical network3 Jun 2021US 2021/0167855 A1National Institute of Information and Communications Technology
Most cited
By later US patents
- Photonic home area network99US 5,983,068 A1999
- Hybrid analog/digital WDM access network with mini-digital optical node83US 6,147,786 ANokia Telecommunications Oy · 2000
- Reconfigurable ring system for the transport of RF signals over optical fibers81US 5,880,863 AGTE Laboratories Incorporated · 1999
- Optically restorable WDM ring network using simple add/drop circuitry77US 5,625,478 ALucent Technologies Inc. · 1997
- Optical network, optical division and insertion node and recovery system from network failure59US 6,137,603 ANEC Corporation · 2000