Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10569596 | Writing tool refill and writing tool using same | Takayuki Ikai, Seiichi Takigawa, Takanori Shindou | 2020-02-25 |
| 8508948 | Communication apparatus | — | 2013-08-13 |
NK
Naohiro Katou
Mitsubishi Pencil Company, Limited: 1 patents #181 of 302Top 60%
Overall (All Time): #1,899,696 of 4,157,543Top 50%
2
Patents All Time