Reconfigurable intelligent surface including multiple unit cells
US-2024195458-A1 · Jun 13, 2024 · US
Passive relay systems
Passive relay systems · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04B7/145 |
| Official title | Passive relay systems |
| Display label | Passive relay systems |
| Total patents | 352 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 6 |
| 2017 | 14 |
| 2018 | 22 |
| 2019 | 12 |
| 2020 | 19 |
| 2021 | 17 |
| 2022 | 25 |
| 2023 | 54 |
| 2024 | 79 |
| 2025 | 76 |
| 2026 | 21 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for relaying signals via a full-duplex, bi-directional relay
US-10516470-B2 · Dec 24, 2019 · US
Full-Duplex, Bi-Directional, Analog Relay
US-2019341994-A1 · Nov 7, 2019 · US
Wireless communication apparatus and method using transmission line for transferring signal
US-10447376-B2 · Oct 15, 2019 · US
Wireless communication apparatus and method using transmission line for transferring signal
US-2019288769-A1 · Sep 19, 2019 · US
Full-duplex, bi-directional, analog relay
US-10389429-B2 · Aug 20, 2019 · US
Method and apparatus for proximity sensing
US-2019246239-A1 · Aug 8, 2019 · US
Method and apparatus for proximity sensing
US-10313836-B2 · Jun 4, 2019 · US
Inductive switching
US-2019165835-A1 · May 30, 2019 · US
Communication method and system that uses low latency/low data bandwidth and high latency/high data bandwidth pathways
US-2019089450-A1 · Mar 21, 2019 · US
Method and apparatus for proximity sensing on a communication device
US-2019037356-A1 · Jan 31, 2019 · US
Successive signal interference mitigation
US-10142133-B2 · Nov 27, 2018 · US
Reflector for changing directionality of wireless communication beam and apparatus including the same
US-2018337459-A1 · Nov 22, 2018 · US
Method and apparatus for proximity sensing on a communication device
US-10136255-B2 · Nov 20, 2018 · US
Method and system for relaying telecommunications signals
US-10116376-B2 · Oct 30, 2018 · US
Wireless communications network using frequency conversion of MIMO signals
US-10097257-B2 · Oct 9, 2018 · US
Method and apparatus for proximity sensing
US-2018270614-A1 · Sep 20, 2018 · US
Radio frequency transmission in work areas
US-2018262262-A1 · Sep 13, 2018 · US
Portable macro antenna system
US-10056963-B1 · Aug 21, 2018 · US
Methods and Apparatus for Analog Relay
US-2018234161-A1 · Aug 16, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04B7/145?
- CPC H04B7/145 is the Cooperative Patent Classification code for “Passive relay systems.”
- How many patents are filed under CPC H04B7/145 (Passive relay systems)?
- Our database includes 352 publications tagged with this CPC code.
- Is patent activity under CPC H04B7/145 growing?
- Publication counts under this code: 79 in 2024 vs 76 in 2025 (latest complete years).