Patents per Year
Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6607325 | Writing instrument | — | 2003-08-19 |
| 6474895 | Writing instrument and method of producing the same | — | 2002-11-05 |
| 5556215 | Writing instrument with overflow chamber | — | 1996-09-17 |
| 5468082 | Pressurized writing instrument with stirring weight | — | 1995-11-21 |
| 5332326 | Writing instrument | — | 1994-07-26 |
| 5249875 | Marker with pump and follower | Katsumi Hori | 1993-10-05 |
| 4973180 | Pen with slide plug and valve | — | 1990-11-27 |
| 4509876 | Writing instrument with overflow chamber and return to supply | — | 1985-04-09 |