- All sections
- B - Performing operationstransporting
- B43L - Articles for writing or drawing uponaccessories for writing or drawing
- B43L 21/00 - Blackboard or slate-cleaning devices
Patent holdings for IPC class B43L 21/00
Total number of patents in this class: 18
10-year publication summary
|
4
|
5
|
0
|
5
|
2
|
0
|
2
|
1
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Amazing Magnets, LLC | 9 |
2 |
| Chameleon Corporation, Inc. | 9 |
2 |
| Comsero, Inc. | 25 |
2 |
| Zero Lab Co., Ltd. | 12 |
2 |
| Shimadzu Corporation | 6305 |
1 |
| ACCO Brands Corporation | 810 |
1 |
| King Faisal University | 923 |
1 |
| Plus Corporation | 73 |
1 |
| Polyvision, naamloze vennootschap | 20 |
1 |
| Wipro Limited | 921 |
1 |
| Wisys Technology Foundation, Inc. | 140 |
1 |
| Long Young Technology Co., Ltd. | 2 |
1 |
| Linker Industrial (Shenzhen) Co., Ltd. | 5 |
1 |
| Shijiazhuang Keda Educational Equipment Co., Ltd. | 3 |
1 |
| Other owners | 0 |