Harmonic-based coding
US-2016380667-A1 · Dec 29, 2016 · US
using different frequencies for the two directions of communication
using different frequencies for the two directions of communication · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04B1/50 |
| Official title | using different frequencies for the two directions of communication |
| Display label | using different frequencies for the two directions of communication |
| Total patents | 653 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 28 |
| 2016 | 40 |
| 2017 | 28 |
| 2018 | 47 |
| 2019 | 63 |
| 2020 | 53 |
| 2021 | 101 |
| 2022 | 90 |
| 2023 | 82 |
| 2024 | 53 |
| 2025 | 51 |
| 2026 | 17 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Communication device and receiving method
US-2016380668-A1 · Dec 29, 2016 · US
Communication device
US-9520858-B2 · Dec 13, 2016 · US
Method for half-duplex FDD operation in LTE FDD network
US-9515696-B2 · Dec 6, 2016 · US
Method and apparatus for performing uplink/downlink transmission in a flexible subframe
US-2016352455-A1 · Dec 1, 2016 · US
Distributed duplexer configuration for blocking and linearity
US-2016329957-A1 · Nov 10, 2016 · US
Reconfigurable fractional-n frequency generation for a phase-locked loop
US-2016322979-A1 · Nov 3, 2016 · US
Wireless electronic device with antenna switching circuitry
US-9484961-B2 · Nov 1, 2016 · US
Antenna system with high dynamic range amplifier for receive antenna elements
US-9485009-B1 · Nov 1, 2016 · US
Full-duplex transceiver circuit and method thereof
US-9473204-B2 · Oct 18, 2016 · US
Tunable bandpass filter for communication system
US-2016301376-A1 · Oct 13, 2016 · US
Mobile communication device and method for adaptive rf front-end tuning
US-2016301465-A1 · Oct 13, 2016 · US
Method and system for filtering out adjacent frequency band interference
US-9461682-B2 · Oct 4, 2016 · US
Apparatus and methods for envelope shaping in power amplifier systems
US-2016261239-A1 · Sep 8, 2016 · US
Mobile communication device and method for adaptive RF front-end tuning
US-9432112-B2 · Aug 30, 2016 · US
Software configurable distributed antenna system and method for bandwidth compression and transport of signals in noncontiguous frequency blocks
US-2016226784-A1 · Aug 4, 2016 · US
Cancellation of spurious responses from local oscillator cross-coupling
US-9391667-B2 · Jul 12, 2016 · US
Low Power Operations In A Wireless Tunneling Transceiver
US-2016198410-A1 · Jul 7, 2016 · US
Radio frequency communication
US-9379760-B2 · Jun 28, 2016 · US
Multiband on ground antenna with a dual radiator arrangement
US-9374126-B2 · Jun 21, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04B1/50?
- CPC H04B1/50 is the Cooperative Patent Classification code for “using different frequencies for the two directions of communication.”
- How many patents are filed under CPC H04B1/50 (using different frequencies for the two directions of communication)?
- Our database includes 653 publications tagged with this CPC code.
- Is patent activity under CPC H04B1/50 growing?
- Publication counts under this code: 53 in 2024 vs 51 in 2025 (latest complete years).