H04J 13/00
Code division multiplex systems
Official title: Code division multiplex systems (for frequency hopping H04B1/713)
H04J13/00 (Code division multiplex systems) appears on 5,346 US grants and 4,962 published applications in this corpus.
Search patents in H04J- Granted patents
- 5,346
- Published applications
- 4,962
- Assignees
- 967
- Inventors
- 5,758
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 7 | 0 |
| 1991 | 11 | 0 |
| 1992 | 24 | 0 |
| 1993 | 26 | 0 |
| 1994 | 46 | 0 |
| 1995 | 42 | 0 |
| 1996 | 48 | 0 |
| 1997 | 60 | 0 |
| 1998 | 77 | 0 |
| 1999 | 93 | 0 |
| 2000 | 95 | 0 |
| 2001 | 122 | 53 |
| 2002 | 120 | 216 |
| 2003 | 140 | 196 |
| 2004 | 123 | 187 |
| 2005 | 123 | 178 |
| 2006 | 208 | 182 |
| 2007 | 124 | 178 |
| 2008 | 138 | 169 |
| 2009 | 149 | 196 |
| 2010 | 186 | 275 |
| 2011 | 199 | 180 |
| 2012 | 237 | 200 |
| 2013 | 262 | 183 |
| 2014 | 243 | 196 |
| 2015 | 231 | 218 |
| 2016 | 235 | 205 |
| 2017 | 212 | 215 |
| 2018 | 169 | 212 |
| 2019 | 231 | 270 |
| 2020 | 273 | 315 |
| 2021 | 244 | 228 |
| 2022 | 238 | 203 |
| 2023 | 198 | 155 |
| 2024 | 195 | 132 |
| 2025 | 118 | 135 |
| 2026 | 54 | 85 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- CP-transparent OOK OFDM waveform for an ambient IoT6 Oct 2026US 12,756,604 B2QUALCOMM Incorporated
- Circular time shift modulation for communications29 Sep 2026US 12,750,150 B2Rutgers, The State University of New Jersey
- Radio communication apparatus and radio communication method22 Sep 2026US 12,744,614 B2Panasonic Holdings Corporation
- Wireless communication method, terminal device and network device22 Sep 2026US 12,744,615 B2Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Transmitter, receiver, transmission method, and reception method22 Sep 2026US 12,744,700 B2Sun Patent Trust
- Bistatic radar sensing in the presence of synchronization signals8 Oct 2026US 2026/0309854 A1Telefonaktiebolaget LM Ericsson (publ)
- PUSCH Antenna Port Indication Enhancement for DMRS Type 28 Oct 2026US 2026/0312763 A1Apple Inc.
- Wireless transmission device, wireless reception device, transmission method, and reception method8 Oct 2026US 2026/0312853 A1Panasonic Intellectual Property Corporation of America
- Transceiver transmission configuration associated with a multi-transceiver device for uplink signal transmission24 Sep 2026US 2026/0292689 A1QUALCOMM Incorporated
- Processing device, network node, client device, and methods thereof17 Sep 2026US 2026/0280601 A1Huawei Technologies Co., Ltd.
Most cited
By later US patents
- System and method for generating signal waveforms in a CDMA cellular telephone system1,721US 5,103,459 AQUALCOMM Incorporated · 1992
- Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum691US 5,282,222 A1994
- Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant683US 5,991,308 ATerayon Communication Systems, Inc. · 1999
- Apparatus and method for digital data transmission using orthogonal codes473US 6,356,555 B1Terayon Communications Systems, Inc. · 2002
- Multicarrier sub-layer for direct sequence channel and multiple-access coding463US 7,430,257 B1Lot 41 Acquisition Foundation, LLC · 2008