H04L 12/42
Loop networks
H04L12/42 (Loop networks) appears on 2,839 US grants and 2,014 published applications in this corpus.
Search patents in H04L- Granted patents
- 2,839
- Published applications
- 2,014
- Assignees
- 897
- Inventors
- 4,945
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 17 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 10 | 0 |
| 1982 | 12 | 0 |
| 1983 | 15 | 0 |
| 1984 | 22 | 0 |
| 1985 | 42 | 0 |
| 1986 | 40 | 0 |
| 1987 | 46 | 0 |
| 1988 | 49 | 0 |
| 1989 | 44 | 0 |
| 1990 | 31 | 0 |
| 1991 | 43 | 0 |
| 1992 | 40 | 0 |
| 1993 | 42 | 0 |
| 1994 | 68 | 0 |
| 1995 | 56 | 0 |
| 1996 | 66 | 0 |
| 1997 | 49 | 0 |
| 1998 | 52 | 0 |
| 1999 | 40 | 0 |
| 2000 | 55 | 0 |
| 2001 | 69 | 21 |
| 2002 | 58 | 84 |
| 2003 | 70 | 120 |
| 2004 | 69 | 81 |
| 2005 | 62 | 125 |
| 2006 | 94 | 108 |
| 2007 | 52 | 91 |
| 2008 | 100 | 91 |
| 2009 | 87 | 113 |
| 2010 | 150 | 121 |
| 2011 | 101 | 92 |
| 2012 | 99 | 98 |
| 2013 | 90 | 81 |
| 2014 | 123 | 104 |
| 2015 | 99 | 79 |
| 2016 | 104 | 67 |
| 2017 | 69 | 66 |
| 2018 | 55 | 73 |
| 2019 | 75 | 68 |
| 2020 | 76 | 81 |
| 2021 | 62 | 60 |
| 2022 | 64 | 43 |
| 2023 | 42 | 58 |
| 2024 | 45 | 36 |
| 2025 | 41 | 32 |
| 2026 | 16 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fast recovery in layer 2 rings using selective replication28 Jul 2026US 12,695,642 B2Cisco Technology, Inc.
- Modular machine-automation system and client module14 Jul 2026US 12,683,831 B2Beckhoff Automation GmbH
- Apparatus, method, and computer program for coordinating interdependent closed loops14 Jul 2026US 12,683,861 B2Nokia Solutions and Networks Oy
- Reversing direction of packet transmission in a network having a ring topology14 Jul 2026US 12,683,866 B2Ciena Corporation
- Extension element for a device in a bus network16 Jun 2026US 12,659,187 B2Constell8
- Collective communication low latency proxy ring offload1 Oct 2026US 2026/0303404 A1Advanced Micro Devices, Inc.
- Managing fate sharing between overlay networks and underlay networks24 Sep 2026US 2026/0291816 A1Cisco Technology, Inc.
- Device and method for performing communication between dies27 Aug 2026US 2026/0252511 A1Electronics and Telecommunications Research Institute
- Deployment of redundancy box functionality in a software-defined network13 Aug 2026US 2026/0238512 A1Schweitzer Engineering Laboratories, Inc.
- Anti-loop method for 5gs tsn virtual bridge, device, and storage medium23 Jul 2026US 2026/0213975 A1Zte Corporation
Most cited
By later US patents
- Diagnostic hardware for serial datalink1,169US 5,124,990 ACaterpillar Inc. · 1992
- Communication network integrating voice data and video with distributed call processing360US 5,341,374 ATriLAN Systems Corporation · 1994
- Computer having packet-based interconnect channel352US 6,009,488 AMicrolinc, LLC · 1999
- Systems and methods for multiple mode voice and data communications using intelligenty bridged TDM and packet buses and methods for performing telephony and data functions using the same342US 6,154,465 AVertical Networks, Inc. · 2000
- Method and apparatus for preventing loops in a network by controlling broadcasts329US 8,615,599 B1Cisco Technology, Inc. · 2013