- 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 13/04 - Devices used in association with a real typewriter, teleprinter, or the like
Patent holdings for IPC class G09B 13/04
Total number of patents in this class: 7
10-year publication summary
|
1
|
1
|
1
|
2
|
1
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4
|
1
|
1
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2
|
0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| No Tears Learning, Inc., DBA Handwriting Without Tears | 29 |
2 |
| Ellsworth Publishing Company, Inc. | 1 |
1 |
| Logitech Europe S.A. | 1188 |
1 |
| EdClub, Inc | 4 |
1 |
| Universidad Autónoma de Chiriquí | 10 |
1 |
| Eugeniu Rotari | 1 |
1 |
| Other owners | 0 |