Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6659671 | Ink introducing tube and writing instrument incorporated with the same | Shigeo Yamada | 2003-12-09 |
| 6629798 | Pen | Toshio Manabe | 2003-10-07 |
| D439611 | Double writing instrument | Toshio Manabe | 2001-03-27 |
| D403706 | Writing pen | — | 1999-01-05 |
| 5342136 | Writing instrument with exchangeable ink refill | — | 1994-08-30 |