Masking open space noise using sound and corresponding visual
US-10923096-B2 · Feb 16, 2021 · US
related to preventing electromagnetic interference in petrol station, hospital, plane or cinema
related to preventing electromagnetic interference in petrol station, hospital, plane or cinema · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04K3/84 |
| Official title | {related to preventing electromagnetic interference in petrol station, hospital, plane or cinema} |
| Display label | related to preventing electromagnetic interference in petrol station, hospital, plane or cinema |
| Total patents | 85 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 9 |
| 2017 | 9 |
| 2018 | 20 |
| 2019 | 11 |
| 2020 | 7 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 4 |
| 2024 | 7 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Acoustic metamaterial
US-2020312292-A1 · Oct 1, 2020 · US
Speech privacy system and/or associated method
US-10726855-B2 · Jul 28, 2020 · US
Apparatuses and methods for acoustic noise cancelling
US-10667035-B2 · May 26, 2020 · US
Sound masking in open-plan spaces using natural sounds
US-10657948-B2 · May 19, 2020 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-2020092031-A1 · Mar 19, 2020 · US
Acoustic metamaterial
US-10573291-B2 · Feb 25, 2020 · US
Masking open space noise using sound and corresponding visual
US-2020051541-A1 · Feb 13, 2020 · US
Masking open space noise using sound and corresponding visual
US-10482866-B2 · Nov 19, 2019 · US
True Wireless Solution For BT Stereo Audio Playback
US-2019342926-A1 · Nov 7, 2019 · US
Integration of cellular phone detection and reporting into a prison telephone system
US-10432343-B2 · Oct 1, 2019 · US
Apparatuses and Methods for Acoustic Noise Cancelling
US-2019297412-A1 · Sep 26, 2019 · US
Voice command masking systems and methods
US-10424299-B2 · Sep 24, 2019 · US
Speech reproduction device configured for masking reproduced speech in a masked speech zone
US-10395634-B2 · Aug 27, 2019 · US
Masking open space noise using sound and corresponding visual
US-10380987-B2 · Aug 13, 2019 · US
Speech privacy system and/or associated method
US-10373626-B2 · Aug 6, 2019 · US
Speech privacy system and/or associated method
US-10304473-B2 · May 28, 2019 · US
Voice command masking systems and methods
US-2019103098-A1 · Apr 4, 2019 · US
Methods and systems for processing a global navigation satellite system signal
US-10193674-B2 · Jan 29, 2019 · US
Method and system to intercept accidental emergency calls in a device repair facility
US-10135962-B2 · Nov 20, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04K3/84?
- CPC H04K3/84 is the Cooperative Patent Classification code for “related to preventing electromagnetic interference in petrol station, hospital, plane or cinema.”
- How many patents are filed under CPC H04K3/84 (related to preventing electromagnetic interference in petrol station, hospital, plane or cinema)?
- Our database includes 85 publications tagged with this CPC code.
- Is patent activity under CPC H04K3/84 growing?
- Publication counts under this code: 7 in 2024 vs 4 in 2025 (latest complete years).