Issued Patents All Time
Showing 51–59 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4544295 | Mechanical pencil with self-contained insert | Kazuo Shimizu | 1985-10-01 |
| 4494642 | Clutch disc | — | 1985-01-22 |
| 4469462 | Writing instrument with sealing tip | Kazuo Shimizu | 1984-09-04 |
| 4382706 | Mechanical pencil | Kazuo Shimizu | 1983-05-10 |
| 4362410 | Mechanical pencil | — | 1982-12-07 |
| 4358210 | Mechanical pencil with chuck closing by normal writing grip | Osamu Torii | 1982-11-09 |
| 4270870 | Mechanical pencil with chuck closing by normal writing grip | Osamu Torii | 1981-06-02 |
| 4269524 | Mechanical pencil | Osamu Torii | 1981-05-26 |
| 4218153 | Mechanical pencil | — | 1980-08-19 |