Method and system for providing assistive listening
US-2025142272-A1 · May 1, 2025 · US
Amplifying systems for the deaf
Amplifying systems for the deaf · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R27/02 |
| Official title | Amplifying systems for the deaf |
| Display label | Amplifying systems for the deaf |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 2 |
| 2017 | 3 |
| 2018 | 8 |
| 2019 | 6 |
| 2020 | 5 |
| 2021 | 7 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Location-based systems and methods for initiating wireless device action
US-2025068387-A1 · Feb 27, 2025 · US
Location-based systems and methods for initiating wireless device action
US-12182472-B2 · Dec 31, 2024 · US
Smart phone network for hearing impaired
US-2024396991-A1 · Nov 28, 2024 · US
Assistive listening device and system and method for providing hearing assistance
US-2024348963-A1 · Oct 17, 2024 · US
Location-based systems and methods for initiating wireless device action
US-2023297320-A1 · Sep 21, 2023 · US
Elevator sound systems
US-11649137-B2 · May 16, 2023 · US
Robot for assisting a user in hearing
US-11472037-B2 · Oct 18, 2022 · US
Online automatic audio transcription for hearing aid users
US-11373654-B2 · Jun 28, 2022 · US
Hearing instrument with an authentication protocol
US-11272298-B2 · Mar 8, 2022 · US
Robot
US-2021331324-A1 · Oct 28, 2021 · US
Multiple transmission network
US-11051296-B2 · Jun 29, 2021 · US
Method for providing sound to persons during a talk and system for performing the method
US-11032654-B2 · Jun 8, 2021 · US
Hearing aid configured to be operating in a communication system
US-2021168538-A1 · Jun 3, 2021 · US
Metadata for ducking control
US-10992276-B2 · Apr 27, 2021 · US
Hearing aid configured to be operating in a communication system
US-10945083-B2 · Mar 9, 2021 · US
Hearing instrument with an authentication protocol
US-2021051423-A1 · Feb 18, 2021 · US
Hearing instrument with a separate link
US-10812916-B2 · Oct 20, 2020 · US
Online automatic audio transcription for hearing aid users
US-2020160867-A1 · May 21, 2020 · US
Audio correlation selection scheme
US-10652718-B2 · May 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R27/02?
- CPC H04R27/02 is the Cooperative Patent Classification code for “Amplifying systems for the deaf.”
- How many patents are filed under CPC H04R27/02 (Amplifying systems for the deaf)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC H04R27/02 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).