- All sections
- B - Performing operations; transporting
- B43L - Articles for writing or drawing upon; accessories for writing or drawing
- B43L 1/04 - Blackboards
Patent holdings for IPC class B43L 1/04
Total number of patents in this class: 65
10-year publication summary
8
|
6
|
7
|
8
|
13
|
5
|
4
|
1
|
4
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Ricoh Company, Ltd. | 13266 |
5 |
Guangzhou Shirui Electronics Co., Ltd. | 651 |
5 |
Guangzhou Shiyuan Electronics Co., Ltd. | 898 |
5 |
Comsero, Inc. | 27 |
5 |
Hitachi Solutions, Ltd. | 167 |
2 |
Pioneer Corporation | 4843 |
2 |
JFE Metal Products & Engineering Inc. | 7 |
2 |
MAYA Design, Inc. | 4 |
2 |
NEC Display Solutions, Ltd. | 822 |
2 |
Sony Corporation | 32931 |
1 |
Seiko Epson Corporation | 18724 |
1 |
Mitsubishi Electric Corporation | 43934 |
1 |
Dai Nippon Printing Co., Ltd. | 3891 |
1 |
Asahi Glass Company, Limited | 2985 |
1 |
National Institute of Advanced Industrial Science and Technology | 3677 |
1 |
ACCO Brands Corporation | 869 |
1 |
Arcelik A.S. | 3617 |
1 |
Comsero, LLC | 1 |
1 |
Izumi-Cosmo Company, Limited | 42 |
1 |
Kokuyo Co., Ltd. | 210 |
1 |
Other owners | 24 |