- 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: 327
10-year publication summary
|
35
|
52
|
34
|
37
|
33
|
38
|
28
|
24
|
24
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| International Business Machines Corporation | 62325 |
15 |
| Microsoft Technology Licensing, LLC | 54289 |
11 |
| Breakthrough Performancetech, LLC | 34 |
6 |
| Educational Testing Service | 240 |
6 |
| JiveWorld SPC | 8 |
6 |
| Google LLC | 44062 |
5 |
| Amazon Technologies, Inc. | 27873 |
4 |
| Neuro Device Group S.A. | 22 |
4 |
| Clover.ai, LLC | 7 |
4 |
| Voxy Holdings Ltd. | 10 |
4 |
| Samsung Electronics Co., Ltd. | 155224 |
3 |
| Casio Computer Co., Ltd. | 3490 |
3 |
| Nippon Telegraph and Telephone Corporation | 15935 |
3 |
| Cirrus Logic, Inc. | 1796 |
3 |
| Purdue Research Foundation | 3874 |
3 |
| Dropbox, Inc. | 1620 |
3 |
| Case Western Reserve University | 1878 |
3 |
| LENA Foundation | 18 |
3 |
| Novotalk, Ltd. | 6 |
3 |
| Pearson Education, Inc. | 472 |
3 |
| Other owners | 232 |