H04L 27/26
Systems using multi-frequency codes
Official title: Systems using multi-frequency codes (H04L27/32 takes precedence)
H04L27/26 (Systems using multi-frequency codes) appears on 25,912 US grants and 30,136 published applications in this corpus.
Search patents in H04L- Granted patents
- 25,912
- Published applications
- 30,136
- Assignees
- 2,486
- Inventors
- 18,453
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 8 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 7 | 0 |
| 1993 | 17 | 0 |
| 1994 | 25 | 0 |
| 1995 | 17 | 0 |
| 1996 | 35 | 0 |
| 1997 | 42 | 0 |
| 1998 | 66 | 0 |
| 1999 | 78 | 0 |
| 2000 | 100 | 0 |
| 2001 | 110 | 82 |
| 2002 | 148 | 281 |
| 2003 | 149 | 327 |
| 2004 | 176 | 483 |
| 2005 | 193 | 605 |
| 2006 | 370 | 742 |
| 2007 | 356 | 945 |
| 2008 | 492 | 1046 |
| 2009 | 536 | 1215 |
| 2010 | 832 | 1122 |
| 2011 | 923 | 1021 |
| 2012 | 1196 | 1068 |
| 2013 | 1282 | 1120 |
| 2014 | 1399 | 1157 |
| 2015 | 1418 | 1366 |
| 2016 | 1309 | 1367 |
| 2017 | 1361 | 1493 |
| 2018 | 1318 | 1528 |
| 2019 | 1599 | 1994 |
| 2020 | 1815 | 2026 |
| 2021 | 1723 | 1825 |
| 2022 | 1559 | 1802 |
| 2023 | 1627 | 1619 |
| 2024 | 1590 | 1424 |
| 2025 | 1322 | 1379 |
| 2026 | 654 | 1099 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cyclic shift diversity-based communication method, apparatus, and system6 Oct 2026US 12,756,431 B2Huawei Technologies Co., Ltd.
- Information transmission method and apparatus, communication node, and storage medium6 Oct 2026US 12,756,442 B2Zte Corporation
- Cancellation pulse generation with reduced waveform storage to reduce crests in transmission signals6 Oct 2026US 12,756,601 B2Texas Instruments Incorporated
- CP-transparent OOK OFDM waveform for an ambient IoT6 Oct 2026US 12,756,604 B2QUALCOMM Incorporated
- Wireless communication method and communications device6 Oct 2026US 12,756,607 B2Quectel Wireless Solutions Co., Ltd.
- Joint communication and sensing8 Oct 2026US 2026/0309836 A1Telefonaktiebolaget LM Ericsson (publ)
- Frequency hopping of reference signal8 Oct 2026US 2026/0312618 A1Nokia Technologies Oy
- Sensing signal transmission method, electronic device, and storage medium8 Oct 2026US 2026/0312743 A1Zte Corporation
- Transmission configuration indication state determination method and apparatus, device, and storage medium8 Oct 2026US 2026/0312752 A1Beijing Xiaomi Mobile Software Co., Ltd.
- Transmitter and method for transmitting data block in wireless communication system8 Oct 2026US 2026/0312754 A1Electronics and Telecommunications Research Institute
Most cited
By later US patents
- Method and apparatus for a RADSL transceiver warm start activation procedure with precoding938US 5,852,630 AGlobespan Semiconductor, Inc. · 1998
- Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines879US 5,479,447 AThe Board of Trustees of the Leland Stanford Junior University · 1995
- Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system793US 6,473,467 B1QUALCOMM Incorporated · 2002
- Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum691US 5,282,222 A1994
- Spatio-temporal processing for communication580US 6,144,711 ACisco Systems, Inc. · 2000