- All sections
- B - Performing operationstransporting
- B43K - Implements for writing or drawing
- B43K 21/04 - Writing-core feeding mechanisms with the writing-cores brought into position by gravity
Patent holdings for IPC class B43K 21/04
Total number of patents in this class: 2
10-year publication summary
|
1
|
0
|
1
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tokiwa Corporation | 140 |
1 |
| Zebra Co., Ltd. | 94 |
1 |
| Other owners | 0 |