Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6758617 | Side knocking-type writing instrument | — | 2004-07-06 |
| 5236271 | Automatic mechanical pencil | — | 1993-08-17 |
| 4729684 | Mechanical pencil | — | 1988-03-08 |
| 4650359 | Mechanical pencil with automatic lead advance | — | 1987-03-17 |
| 4521126 | Mechanical pencil | Takashi Ishikawa | 1985-06-04 |
| D269189 | Mechanical pencil or similar article | — | 1983-05-31 |
| D260532 | Casing for an eraser or the like | — | 1981-09-01 |
| D258217 | Mechanical pencil or similar article | — | 1981-02-10 |
| 4240759 | Mechanical pencil having guides to match guides on a refill cartridge | Kenji Matsumoto | 1980-12-23 |