- 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 3/00 - Manually- or mechanically-operated teaching appliances working with questions and answers
Patent holdings for IPC class G09B 3/00
Total number of patents in this class: 246
10-year publication summary
|
12
|
14
|
18
|
9
|
7
|
9
|
5
|
3
|
6
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Educational Testing Service | 259 |
9 |
| Pearson Education, Inc. | 453 |
8 |
| Houghton Mifflin Harcourt Publishing Company | 298 |
7 |
| Monk Akarshala Design Private Limited | 43 |
6 |
| Monk Akarshala Inc. | 42 |
6 |
| Microsoft Technology Licensing, LLC | 51439 |
5 |
| Breakthrough Performancetech, LLC | 34 |
5 |
| SAP SE | 9657 |
4 |
| Democrasoft, Inc. | 9 |
4 |
| Distance EDU Learning, Inc. | 6 |
4 |
| Harcourt Assessment, Inc. | 15 |
3 |
| Kryterion, Inc. | 24 |
3 |
| ProctorU Inc. | 16 |
3 |
| Scantron Corporation | 62 |
3 |
| Tata Consultancy Services Limited | 2066 |
3 |
| VXI Global Solutions, LLC | 8 |
3 |
| CONDUENT Business Services, LLC | 686 |
3 |
| Cricket Media Services, Inc. | 78 |
3 |
| Centre National de La Recherche Scientifique | 9632 |
2 |
| Becton, Dickinson and Company | 6712 |
2 |
| Other owners | 160 |