H04B 1/50
Using different frequencies for the two directions of communication
Official title: using different frequencies for the two directions of communication
H04B1/50 (Using different frequencies for the two directions of communication) appears on 2,500 US grants and 2,641 published applications in this corpus.
Search patents in H04B- Granted patents
- 2,500
- Published applications
- 2,641
- Assignees
- 731
- Inventors
- 4,415
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 9 | 0 |
| 1991 | 3 | 0 |
| 1992 | 7 | 0 |
| 1993 | 9 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 13 | 0 |
| 1997 | 10 | 0 |
| 1998 | 14 | 0 |
| 1999 | 12 | 0 |
| 2000 | 20 | 0 |
| 2001 | 18 | 5 |
| 2002 | 15 | 27 |
| 2003 | 19 | 37 |
| 2004 | 24 | 47 |
| 2005 | 27 | 33 |
| 2006 | 48 | 48 |
| 2007 | 19 | 58 |
| 2008 | 30 | 60 |
| 2009 | 23 | 51 |
| 2010 | 44 | 62 |
| 2011 | 65 | 85 |
| 2012 | 73 | 85 |
| 2013 | 73 | 126 |
| 2014 | 129 | 157 |
| 2015 | 146 | 162 |
| 2016 | 160 | 193 |
| 2017 | 170 | 172 |
| 2018 | 193 | 178 |
| 2019 | 198 | 193 |
| 2020 | 197 | 162 |
| 2021 | 141 | 141 |
| 2022 | 129 | 119 |
| 2023 | 100 | 157 |
| 2024 | 98 | 119 |
| 2025 | 115 | 94 |
| 2026 | 78 | 70 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and apparatuses for determining whether an anomalous event occurred locally at a first entity6 Oct 2026US 12,756,413 B2Telefonaktiebolaget LM Ericsson (publ)
- Coexistence management for radio frequency communication systems29 Sep 2026US 12,750,083 B2Skyworks Solutions, Inc.
- Systems and methods for adaptive selection of estimation taps29 Sep 2026US 12,750,084 B2Samsung Electronics Co., Ltd.
- Reception signal processing device and method for cancelling self-interference signal generated by transmission signal22 Sep 2026US 12,744,559 B2Korea University Research and Business Foundation
- Phase shift of signals for RFI mitigation22 Sep 2026US 12,744,605 B2Intel Corporation
- Device and method for performing communication in licenced band and unlicenced band1 Oct 2026US 2026/0303144 A1Thinkware Corporation
- Symbol-Based Control of Passive Intermodulation Cancellation in a Network Node24 Sep 2026US 2026/0291541 A1
- Full-duplex beam-nulling isolation beween transmit and receive arrays24 Sep 2026US 2026/0291600 A1ViaSat, Inc.
- Circuit and method for improving sensing accuracy17 Sep 2026US 2026/0280540 A1Realtek Semiconductor Corp.
- Radio frequency communication system, device and method27 Aug 2026US 2026/0254467 A1Beijing BOE Technology Development Co., Ltd.
Most cited
By later US patents
- Waste energy control and management in power amplifier368US 5,568,088 AEricsson GE Mobile Communications Inc. · 1996
- Active cancellation of transmitter leakage in a wireless transceiver363US 8,175,535 B2Telefonaktiebolaget LM Ericsson (publ) · 2012
- Intelligent backhaul radio and antenna system311US 8,467,363 B2CBF Networks, Inc. · 2013
- Adaptive method and apparatus for eliminating interference between radio transceivers251US 5,630,223 AAmerican Nucleonics Corporation · 1997
- Self-cancelling full-duplex RF communication system243US 5,691,978 ASignal Science, Inc. · 1997