- All sections
- G - Physics
- G09B - Educational or demonstration appliances; appliances for teaching, or communicating with, the blind, deaf or mute; models; planetaria; globes; maps; diagrams
- G09B 19/04 - Speaking
Patent holdings for IPC class G09B 19/04
Total number of patents in this class: 310
10-year publication summary
36
|
39
|
35
|
52
|
34
|
37
|
33
|
38
|
26
|
10
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
International Business Machines Corporation | 60644 |
13 |
Microsoft Technology Licensing, LLC | 51439 |
9 |
Educational Testing Service | 259 |
8 |
LENA Foundation | 22 |
6 |
Breakthrough Performancetech, LLC | 34 |
5 |
Google LLC | 38759 |
5 |
Voxy, Inc., DBA Voxy, Inc. | 16 |
4 |
Neuro Device Group S.A. | 21 |
4 |
Gammakite, Inc. | 4 |
4 |
Samsung Electronics Co., Ltd. | 131630 |
3 |
Amazon Technologies, Inc. | 24422 |
3 |
Casio Computer Co., Ltd. | 3343 |
3 |
Nippon Telegraph and Telephone Corporation | 14195 |
3 |
Cirrus Logic, Inc. | 1719 |
3 |
Purdue Research Foundation | 3277 |
3 |
Case Western Reserve University | 1727 |
3 |
Interactive Intelligence Group, Inc. | 58 |
3 |
Novotalk, Ltd. | 6 |
3 |
Pearson Education, Inc. | 453 |
3 |
Pitchvantage LLC | 5 |
3 |
Other owners | 219 |