H04B 1/54
Using the same frequency for two directions of communication
Official title: using the same frequency for two directions of communication (H04B1/44 takes precedence)
H04B1/54 (Using the same frequency for two directions of communication) appears on 754 US grants and 506 published applications in this corpus.
Search patents in H04B- Granted patents
- 754
- Published applications
- 506
- Assignees
- 349
- Inventors
- 1,363
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 13 | 0 |
| 1978 | 8 | 0 |
| 1979 | 8 | 0 |
| 1980 | 8 | 0 |
| 1981 | 15 | 0 |
| 1982 | 19 | 0 |
| 1983 | 16 | 0 |
| 1984 | 8 | 0 |
| 1985 | 11 | 0 |
| 1986 | 11 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 7 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 14 | 0 |
| 1995 | 19 | 0 |
| 1996 | 17 | 0 |
| 1997 | 11 | 0 |
| 1998 | 17 | 0 |
| 1999 | 18 | 0 |
| 2000 | 12 | 0 |
| 2001 | 14 | 7 |
| 2002 | 10 | 11 |
| 2003 | 9 | 4 |
| 2004 | 12 | 15 |
| 2005 | 8 | 9 |
| 2006 | 11 | 14 |
| 2007 | 6 | 7 |
| 2008 | 12 | 3 |
| 2009 | 9 | 5 |
| 2010 | 8 | 11 |
| 2011 | 4 | 14 |
| 2012 | 6 | 10 |
| 2013 | 18 | 41 |
| 2014 | 18 | 25 |
| 2015 | 30 | 32 |
| 2016 | 40 | 34 |
| 2017 | 28 | 40 |
| 2018 | 35 | 42 |
| 2019 | 47 | 40 |
| 2020 | 35 | 26 |
| 2021 | 23 | 23 |
| 2022 | 21 | 21 |
| 2023 | 19 | 29 |
| 2024 | 17 | 23 |
| 2025 | 27 | 17 |
| 2026 | 12 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for performing full duplex radio in wireless communication system29 Sep 2026US 12,750,085 B2Industry-Academic Cooperation Foundation, Yonsei University
- Antenna structure including power and signal lines25 Aug 2026US 12,719,507 B2Atmosic Technologies, Inc.
- Bidirectional interface port11 Aug 2026US 12,706,629 B2Telefonaktiebolaget LM Ericsson (publ)
- Electronic device for obtaining reflection coefficient of antenna and operating method thereof11 Aug 2026US 12,706,632 B2Samsung Electronics Co., Ltd.
- Simultaneous transmit signals and receive signals4 Aug 2026US 12,701,032 B2Rtx Bbn Technologies, Inc.
- System and a device for a compact, preprogrammed transceiver10 Sep 2026US 2026/0269856 A1
- Frequency hopping for data channel repetition in full duplex30 Jul 2026US 2026/0222128 A1QUALCOMM Incorporated
- Methods, devices and systems for radio frequency circuit having receive-transmit co-matching network2 Apr 2026US 2026/0095204 A1Cypress Semiconductor Corporation
- Front end architecture with converged 2g and 5g broadband4 Dec 2025US 2025/0373279 A1
- Random, sequential, or simultaneous multi-beam circular antenna array and beam forming networks with up to 360° coverage20 Nov 2025US 2025/0357964 A1
Most cited
By later US patents
- Passive universal communicator system310US 5,164,985 A1992
- Full duplex ultrawide-band communication system and method272US 5,687,169 ATime Domain Systems, Inc. · 1997
- Fast locking mechanism for channelized ultrawide-band communications257US 5,832,035 ATime Domain Corporation · 1998
- Self-cancelling full-duplex RF communication system243US 5,691,978 ASignal Science, Inc. · 1997
- Multiple access communications system and method using code and time division226US 5,894,473 AEricsson Inc. · 1999