- 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 21/06 - Devices for teaching lip-reading
Patent holdings for IPC class G09B 21/06
Total number of patents in this class: 1
10-year publication summary
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0
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0
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0
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2
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0
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0
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0
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0
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0
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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
|
|---|---|---|
| MasterCard International Incorporated | 4846 |
1 |
| Other owners | 0 |