H04L 5/14
Two-way operation using the same type of signal, i.e. duplex
H04L5/14 (Two-way operation using the same type of signal, i.e. duplex) appears on 10,269 US grants and 11,924 published applications in this corpus.
Search patents in H04L- Granted patents
- 10,269
- Published applications
- 11,924
- Assignees
- 1,542
- Inventors
- 10,532
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 11 | 0 |
| 1978 | 11 | 0 |
| 1979 | 7 | 0 |
| 1980 | 10 | 0 |
| 1981 | 8 | 0 |
| 1982 | 12 | 0 |
| 1983 | 15 | 0 |
| 1984 | 14 | 0 |
| 1985 | 8 | 0 |
| 1986 | 19 | 0 |
| 1987 | 27 | 0 |
| 1988 | 13 | 0 |
| 1989 | 20 | 0 |
| 1990 | 22 | 0 |
| 1991 | 23 | 0 |
| 1992 | 20 | 0 |
| 1993 | 12 | 0 |
| 1994 | 24 | 0 |
| 1995 | 24 | 0 |
| 1996 | 35 | 0 |
| 1997 | 28 | 0 |
| 1998 | 55 | 0 |
| 1999 | 59 | 0 |
| 2000 | 62 | 0 |
| 2001 | 66 | 24 |
| 2002 | 70 | 148 |
| 2003 | 78 | 97 |
| 2004 | 116 | 120 |
| 2005 | 78 | 129 |
| 2006 | 114 | 101 |
| 2007 | 73 | 165 |
| 2008 | 104 | 173 |
| 2009 | 104 | 157 |
| 2010 | 109 | 155 |
| 2011 | 141 | 186 |
| 2012 | 166 | 193 |
| 2013 | 177 | 391 |
| 2014 | 273 | 579 |
| 2015 | 448 | 911 |
| 2016 | 650 | 943 |
| 2017 | 812 | 851 |
| 2018 | 772 | 748 |
| 2019 | 870 | 871 |
| 2020 | 820 | 813 |
| 2021 | 726 | 702 |
| 2022 | 640 | 787 |
| 2023 | 670 | 731 |
| 2024 | 646 | 747 |
| 2025 | 599 | 691 |
| 2026 | 390 | 511 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04L 5/1469Using time-sharing3,129
- H04L 5/1438Negotiation of transmission parameters prior to communication1,121
- H04L 5/16Half-duplex systems972
- H04L 5/1461Suppression of signals in the return path, i.e. bidirectional control circuits729
- H04L 5/143For modulated signals701
- H04L 5/1423For simultaneous baseband signals340
- H04L 5/1415Using control lines71
- H04L 5/18Automatic changing of the traffic direction69
All 9 subgroupsShow fewer
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Most cited
By later US patents
- Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum691US 5,282,222 A1994
- Method for frequency division duplex communications526US 5,933,421 AAT&T Wireless Services, Inc. · 1999
- Host node device and methods for use therewith480US 9,866,309 B2AT&T Intellectual Property I, L. P. · 2018
- Method and system for managing quantity of carriers in air interface connection based on type of content423US 9,820,289 B1Sprint Spectrum L. P. · 2017
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