- 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 19/02 - Counting; Calculating
Patent holdings for IPC class G09B 19/02
Total number of patents in this class: 150
10-year publication summary
|
20
|
36
|
46
|
36
|
40
|
30
|
32
|
23
|
15
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| May Patents Ltd. | 124 |
18 |
| Casio Computer Co., Ltd. | 3343 |
8 |
| Education4sight GmbH | 20 |
5 |
| Breakthrough Performancetech, LLC | 34 |
4 |
| Fluidity Software, Inc. | 5 |
4 |
| Pearson Education, Inc. | 453 |
3 |
| Equalkey Corp. | 4 |
3 |
| Bonderiffic Math LLC | 3 |
3 |
| Age of Learning, Inc. | 68 |
2 |
| Chegg, Inc. | 106 |
2 |
| ValueCorp Pacific, Inc. | 12 |
2 |
| Wacom Co., Ltd. | 1629 |
2 |
| Kontu, Inc. | 6 |
2 |
| Classcube Co., Ltd. | 10 |
2 |
| Knowledgehook Inc. | 15 |
2 |
| Hangzhou Dana Technology Inc. | 21 |
2 |
| Media4th One | 4 |
2 |
| Idinnolab Co.,Ltd | 2 |
2 |
| Study Edge, Inc. | 19 |
2 |
| International Business Machines Corporation | 60644 |
1 |
| Other owners | 79 |