System and method for precision blocking of personal area network piconets
US-2026067023-A1 · Mar 5, 2026 · US
Jamming having variable characteristics
Jamming having variable characteristics · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04K3/40 |
| Official title | {Jamming having variable characteristics} |
| Display label | Jamming having variable characteristics |
| Total patents | 34 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 8 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Analog jammer detection for automatic gain control (agc)
US-2026058682-A1 · Feb 26, 2026 · US
Monitoring device, monitoring method, and non-transitory computer readable medium
US-2025279843-A1 · Sep 4, 2025 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-12199748-B2 · Jan 14, 2025 · US
Adaptive gain for receiving wireless signals
US-12015432-B2 · Jun 18, 2024 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-2024014920-A1 · Jan 11, 2024 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-11757560-B2 · Sep 12, 2023 · US
Adaptive gain for receiving wireless signals
US-2023091514-A1 · Mar 23, 2023 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-2022231781-A1 · Jul 21, 2022 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-11258530-B2 · Feb 22, 2022 · US
Concealed jamming attach apparatus and method which use false acknowledgement frame
US-11108491-B2 · Aug 31, 2021 · US
Method and apparatus for physical layer security communication in wireless communication system
US-10931395-B2 · Feb 23, 2021 · US
Concealed jamming attach apparatus and method which use false acknowledgement frame
US-2021044378-A1 · Feb 11, 2021 · US
Method for jamming synthetic aperture radars and associated device
US-10852391-B2 · Dec 1, 2020 · US
Method and apparatus for physical layer security communication in wireless communication system
US-2020092030-A1 · Mar 19, 2020 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-2020092031-A1 · Mar 19, 2020 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-10432343-B2 · Oct 1, 2019 · US
Blocking the capture of photo and video content
US-10389475-B2 · Aug 20, 2019 · US
Method for jamming synthetic aperture radars and associated device
US-2019033427-A1 · Jan 31, 2019 · US
Blocking the capture of photo and video content
US-2019007158-A1 · Jan 3, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04K3/40?
- CPC H04K3/40 is the Cooperative Patent Classification code for “Jamming having variable characteristics.”
- How many patents are filed under CPC H04K3/40 (Jamming having variable characteristics)?
- Our database includes 34 publications tagged with this CPC code.
- Is patent activity under CPC H04K3/40 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).