| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 6 | |
| #2 | EPO (European Patent Office) | 4 | |
| #3 | China | 1 | |
| #4 | Taiwan | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Writing or drawing tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Yamanaka Shizuo | 11 |
| #2 | Shimada Nobuhiko | 4 |
| #3 | Yamanska Shizuo | 1 |
| #4 | Shizuo Yamanaka | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JP2020168782A | Pen tip | |
| JP2012136009A | Conical nib, and writing instrument using the same | |
| CN102248836A | Conical pen nib and stationery supply using same | |
| JP2010115786A | Conical pen nib and writing implement using the same | |
| JP2008179098A | Writing utensil | |
| JP2007320139A | Conical penpoint and manufacturing method thereof | |
| JP2007268905A | Conical pen point and its manufacturing method | |
| EP1550563A2 | Ceramic composite conical nib |