H04L 45/48
Routing tree calculation
H04L45/48 (Routing tree calculation) appears on 1,580 US grants and 1,571 published applications in this corpus.
Search patents in H04L- Granted patents
- 1,580
- Published applications
- 1,571
- Assignees
- 409
- Inventors
- 2,613
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 6 | 4 |
| 2002 | 16 | 18 |
| 2003 | 18 | 28 |
| 2004 | 24 | 53 |
| 2005 | 18 | 56 |
| 2006 | 26 | 47 |
| 2007 | 15 | 66 |
| 2008 | 47 | 52 |
| 2009 | 55 | 76 |
| 2010 | 79 | 75 |
| 2011 | 98 | 63 |
| 2012 | 65 | 62 |
| 2013 | 62 | 61 |
| 2014 | 84 | 86 |
| 2015 | 74 | 90 |
| 2016 | 97 | 66 |
| 2017 | 75 | 107 |
| 2018 | 70 | 67 |
| 2019 | 123 | 100 |
| 2020 | 103 | 90 |
| 2021 | 96 | 84 |
| 2022 | 75 | 71 |
| 2023 | 57 | 42 |
| 2024 | 64 | 55 |
| 2025 | 47 | 29 |
| 2026 | 24 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Information flooding method and device18 Aug 2026US 12,712,807 B2Huawei Technologies Co., Ltd.
- Communication method and apparatus4 Aug 2026US 12,701,081 B2New H3C Technologies Co., Ltd.
- Adaptive network systems and methods for identifying and recovering lost packets16 Jun 2026US 12,659,082 B2Google Inc.
- Detecting network events having adverse user impact16 Jun 2026US 12,659,255 B2Hewlett Packard Enterprise Development LP
- Independent datastore in a network routing environment9 Jun 2026US 12,652,192 B2Arrcus Inc.
- Service tree for multicast flow visiblity10 Sep 2026US 2026/0270198 A1Cisco Technology, Inc.
- Unique Identifier for Reverse Path Forwarding with Multicast VPNs3 Sep 2026US 2026/0261509 A1Ciena Corporation
- Mesh Network Creation for Variable Energy-Harvesting Devices3 Sep 2026US 2026/0261510 A1PassiveLogic, Inc.
- Multicast Flow-Zone Switching30 Jul 2026US 2026/0222240 A1Consensii LLC
- Latency-aware distributed sfc placement in a federated edge environment30 Jul 2026US 2026/0222334 A1Dell Products L. P.
Most cited
By later US patents
- Radio frequency local area network481US 5,295,154 ANorand Corporation · 1994
- Reconfiguration system and method for high-speed mesh connected local area network383US 5,138,615 ADigital Equipment Corporation · 1992
- Hierarchical data collection network supporting packetized voice communications among wireless terminals and telephones346US 6,389,010 B1Intermec IP Corp. · 2002
- System for managing topology of a network in spanning tree data structure by maintaining link table and parent table in each network node302US 5,606,669 AInternational Business Machines Corporation · 1997
- System and method for point to multipoint inter-domain multiprotocol label switching traffic engineering path calculation298US 8,351,418 B2Futurewei Technologies, Inc. · 2013