Digital microfludics-based braille actuation in a stretchable display
US-12555492-B2 · Feb 17, 2026 · US
Devices for Braille writing (typewriters for Braille B41J3/32)
Devices for Braille writing (typewriters for Braille B41J3/32) · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G09B21/02 |
| Official title | Devices for Braille writing (typewriters for Braille B41J3/32) |
| Display label | Devices for Braille writing (typewriters for Braille B41J3/32) |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 6 |
| 2017 | 4 |
| 2018 | 7 |
| 2019 | 6 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 4 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Apparatus, method, and storage medium
US-2025187348-A1 · Jun 12, 2025 · US
Split Line Braille System
US-2025046212-A1 · Feb 6, 2025 · US
Braille display device
US-12175881-B2 · Dec 24, 2024 · US
Vision-impaired user typing mode for computing systems
US-12111978-B2 · Oct 8, 2024 · US
Haptic reading device implementing the braille-perkins method
US-2024212522-A1 · Jun 27, 2024 · US
Vision-impaired user typing mode for computing systems
US-2024061517-A1 · Feb 22, 2024 · US
Braille Display Device
US-2023377481-A1 · Nov 23, 2023 · US
Impact resistant modular braille display device
US-11715389-B2 · Aug 1, 2023 · US
Input apparatus and control method thereof
US-2023196942-A1 · Jun 22, 2023 · US
Automatic calibration of braille interface
US-2023090403-A1 · Mar 23, 2023 · US
Information output device
US-11586289-B2 · Feb 21, 2023 · US
Digital microfludics-based braille actuation in a stretchable display
US-2022398941-A1 · Dec 15, 2022 · US
Impact Resistant Modular Braille Display Device
US-2022036763-A1 · Feb 3, 2022 · US
Character output device
US-2021217326-A1 · Jul 15, 2021 · US
Impact resistant modular braille display device
US-11062623-B2 · Jul 13, 2021 · US
System for vision impaired users to execute electronic transactions
US-11017394-B2 · May 25, 2021 · US
Information output device
US-2020257365-A1 · Aug 13, 2020 · US
Impact Resistant Modular Braille Display Device
US-2020251015-A1 · Aug 6, 2020 · US
Refreshable braille display device
US-10573199-B2 · Feb 25, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G09B21/02?
- CPC G09B21/02 is the Cooperative Patent Classification code for “Devices for Braille writing (typewriters for Braille B41J3/32).”
- How many patents are filed under CPC G09B21/02 (Devices for Braille writing (typewriters for Braille B41J3/32))?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC G09B21/02 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).