- All sections
- G - Physics
- G09B - Educational or demonstration appliancesappliances for teaching, or communicating with, the blind, deaf or mutemodelsplanetariaglobesmapsdiagrams
- G09B 19/02 - CountingCalculating
Patent holdings for IPC class G09B 19/02
Total number of patents in this class: 168
10-year publication summary
|
46
|
36
|
40
|
30
|
32
|
24
|
15
|
14
|
12
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| May Patents Ltd. | 167 |
22 |
| Casio Computer Co., Ltd. | 3496 |
8 |
| Breakthrough Performancetech, LLC | 34 |
5 |
| Education4sight GmbH | 21 |
5 |
| Fluidity Software, Inc. | 5 |
4 |
| ValueCorp Pacific, Inc. | 18 |
4 |
| Zezedu Corp. | 4 |
4 |
| Pearson Education, Inc. | 474 |
3 |
| Equalkey Corp. | 4 |
3 |
| Bonderiffic Math LLC | 3 |
3 |
| International Business Machines Corporation | 62634 |
2 |
| Microsoft Technology Licensing, LLC | 54466 |
2 |
| Age of Learning, Inc. | 72 |
2 |
| Chegg, Inc. | 101 |
2 |
| Wacom Co., Ltd. | 2110 |
2 |
| Kontu, Inc. | 5 |
2 |
| Classcube Co., Ltd. | 9 |
2 |
| Knowledgehook Inc. | 16 |
2 |
| Hangzhou Dana Technology Inc. | 21 |
2 |
| Media4th One | 4 |
2 |
| Other owners | 87 |