- All sections
- G - Physics
- G09B - Educational or demonstration appliancesappliances for teaching, or communicating with, the blind, deaf or mutemodelsplanetariaglobesmapsdiagrams
- G09B 19/04 - Speaking
Patent holdings for IPC class G09B 19/04
Total number of patents in this class: 311
10-year publication summary
|
39
|
35
|
51
|
33
|
35
|
31
|
37
|
27
|
23
|
13
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| International Business Machines Corporation | 61402 |
14 |
| Microsoft Technology Licensing, LLC | 53854 |
10 |
| Educational Testing Service | 240 |
6 |
| Breakthrough Performancetech, LLC | 34 |
5 |
| Google LLC | 42510 |
5 |
| LENA Foundation | 20 |
4 |
| Voxy, Inc., DBA Voxy, Inc. | 16 |
4 |
| Neuro Device Group S.A. | 21 |
4 |
| JiveWorld SPC | 7 |
4 |
| Clover.ai, LLC | 7 |
4 |
| Samsung Electronics Co., Ltd. | 147334 |
3 |
| Amazon Technologies, Inc. | 26867 |
3 |
| Casio Computer Co., Ltd. | 3432 |
3 |
| Nippon Telegraph and Telephone Corporation | 17367 |
3 |
| Cirrus Logic, Inc. | 1781 |
3 |
| Purdue Research Foundation | 3654 |
3 |
| Case Western Reserve University | 1831 |
3 |
| Novotalk, Ltd. | 6 |
3 |
| Pearson Education, Inc. | 466 |
3 |
| Pitchvantage LLC | 5 |
3 |
| Other owners | 221 |