H04L 12/4637
Interconnected ring systems
Official title: {Interconnected ring systems}
H04L12/4637 (Interconnected ring systems) appears on 247 US grants and 203 published applications in this corpus.
Search patents in H04L- Granted patents
- 247
- Published applications
- 203
- Assignees
- 133
- Inventors
- 555
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 14 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 3 | 0 |
| 1998 | 13 | 0 |
| 1999 | 6 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 1 |
| 2002 | 3 | 7 |
| 2003 | 6 | 41 |
| 2004 | 2 | 5 |
| 2005 | 2 | 11 |
| 2006 | 7 | 5 |
| 2007 | 1 | 7 |
| 2008 | 13 | 11 |
| 2009 | 8 | 13 |
| 2010 | 5 | 14 |
| 2011 | 9 | 8 |
| 2012 | 9 | 9 |
| 2013 | 9 | 10 |
| 2014 | 18 | 17 |
| 2015 | 9 | 7 |
| 2016 | 15 | 7 |
| 2017 | 5 | 3 |
| 2018 | 5 | 5 |
| 2019 | 3 | 2 |
| 2020 | 2 | 6 |
| 2021 | 7 | 1 |
| 2022 | 1 | 2 |
| 2023 | 2 | 4 |
| 2024 | 2 | 2 |
| 2025 | 4 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods and apparatus for forwarding packets in a mesh switching system26 May 2026US 12,640,961 B1Marvell Asia Pte Ltd
- Data transmission method and communication apparatus27 Jan 2026US 12,537,716 B2Huawei Technologies Co., Ltd.
- Label distribution protocol (LDP) convergence in ring topologies18 Nov 2025US 12,476,906 B2Ciena Corporation
- Method and system for improved interconnecting ring transition from open to closed state in LC-mode21 Oct 2025US 12,452,125 B2Ale USA Inc.
- Communication resilience in a ring network topology8 Jul 2025US 12,355,588 B2Adtran, Inc.
- Method for data transmission, and chip2 Jul 2026US 2026/0189640 A1Shenzhen Goodix Technology Co., Ltd.
- Method for data transmission, chip, and storage medium25 Jun 2026US 2026/0181058 A1Shenzhen Goodix Technology Co., Ltd.
- Chip25 Jun 2026US 2026/0181060 A1Shenzhen Goodix Technology Co., Ltd.
- Avionic ring communication network, and related civil aircraft30 Apr 2026US 2026/0121888 A1
- G.8032 with optical bypass10 Jul 2025US 2025/0227397 A1Ciena Corporation
Most cited
By later US patents
- Method and apparatus for preventing loops in a network by controlling broadcasts329US 8,615,599 B1Cisco Technology, Inc. · 2013
- Methods and apparatus for fiber channel interconnection of private loop devices206US 6,118,776 AVixel Corporation · 2000
- Method and apparatus for interfacing stations in a multiloop communications system190US 4,287,592 ABurroughs Corporation · 1981
- Fibre channel arbitrated loop bufferless switch circuitry to increase bandwidth without significant increase in cost168US 6,614,796 B1Gadzoox Networks, Inc. · 2003
- Accelerator fiber channel hub and protocol151US 5,751,715 AGadzoox Microsystems · 1998