- All sections
- B - Performing operationstransporting
- B43L - Articles for writing or drawing uponaccessories for writing or drawing
- B43L 1/04 - Blackboards
Patent holdings for IPC class B43L 1/04
Total number of patents in this class: 63
10-year publication summary
|
7
|
8
|
13
|
5
|
4
|
1
|
4
|
1
|
2
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Guangzhou Shirui Electronics Co., Ltd. | 747 |
5 |
| Guangzhou Shiyuan Electronics Co., Ltd. | 937 |
5 |
| Comsero, Inc. | 25 |
5 |
| Ricoh Company, Ltd. | 13345 |
4 |
| Hitachi Solutions, Ltd. | 177 |
2 |
| MAYA Design, Inc. | 4 |
2 |
| NEC Display Solutions, Ltd. | 786 |
2 |
| Sony Corporation | 30608 |
1 |
| Seiko Epson Corporation | 19806 |
1 |
| Mitsubishi Electric Corporation | 47338 |
1 |
| Dai Nippon Printing Co., Ltd. | 4170 |
1 |
| Pioneer Corporation | 4039 |
1 |
| Asahi Glass Company, Limited | 2707 |
1 |
| National Institute of Advanced Industrial Science and Technology | 3799 |
1 |
| ACCO Brands Corporation | 819 |
1 |
| Arcelik A.S. | 3416 |
1 |
| Comsero, LLC | 1 |
1 |
| Izumi-Cosmo Company, Limited | 37 |
1 |
| JFE Metal Products & Engineering Inc. | 6 |
1 |
| Kokuyo Co., Ltd. | 227 |
1 |
| Other owners | 25 |