| # | Country | Total Patents | |
|---|---|---|---|
| #1 | China | 3 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | Taiwan | 2 | |
| #5 | United States | 2 | |
| #6 | Republic of Korea | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Writing or drawing tools | |
| #2 | Certain plastics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Odaka Haruo | 13 |
| Publication | Filing date | Title |
|---|---|---|
| CN111655507A | Direct liquid type writing tool | |
| US2016257161A1 | Ink reservoir member for writing instrument, and valve type writing instrument using the same |