H04L 12/423
With centralised control
Official title: with centralised control, e.g. polling
H04L12/423 (With centralised control) appears on 193 US grants and 138 published applications in this corpus.
Search patents in H04L- Granted patents
- 193
- Published applications
- 138
- Assignees
- 138
- Inventors
- 431
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 5 |
| 2003 | 2 | 2 |
| 2004 | 4 | 4 |
| 2005 | 3 | 5 |
| 2006 | 4 | 14 |
| 2007 | 3 | 6 |
| 2008 | 7 | 5 |
| 2009 | 2 | 9 |
| 2010 | 13 | 4 |
| 2011 | 7 | 5 |
| 2012 | 3 | 1 |
| 2013 | 5 | 2 |
| 2014 | 4 | 5 |
| 2015 | 4 | 5 |
| 2016 | 5 | 4 |
| 2017 | 9 | 8 |
| 2018 | 3 | 3 |
| 2019 | 6 | 10 |
| 2020 | 11 | 10 |
| 2021 | 4 | 7 |
| 2022 | 7 | 6 |
| 2023 | 8 | 4 |
| 2024 | 3 | 3 |
| 2025 | 7 | 4 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Switching control of communication route28 Apr 2026US 12,615,204 B2Rakuten Mobile, Inc.
- Method for operating a ring communication network14 Apr 2026US 12,603,797 B2Caterpillar Inc.
- Identifying source of layer-2 loop in ring network30 Sep 2025US 12,432,089 B2Hewlett Packard Enterprise Development LP
- Photovoltaic system and communication method therefor15 Jul 2025US 12,362,571 B2Sungrow Power Supply Co., Ltd.
- Master device, arithmetic processing device, programmable logic controller, network, and method1 Jul 2025US 12,348,332 B2OMTON Corporation
- Collective communication low latency proxy ring offload1 Oct 2026US 2026/0303404 A1Advanced Micro Devices, 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.
- Triggered query in chain devices, system, and method21 May 2026US 2026/0140900 A1
Most cited
By later US patents
- Computer having packet-based interconnect channel352US 6,009,488 AMicrolinc, LLC · 1999
- Passive data collection system for market research data260US 5,490,060 AInformation Resources, Inc. · 1996
- Abnormality monitor method and abnormality monitor system in a network148US 6,154,859 AYazaki Corporation · 2000
- Terminal address assignment in a broadcast transmission system120US 4,680,583 ANorthern Telecom Limited · 1987
- Communication network113US 4,937,811 AGeneral Instrument Corporation · 1990