Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6739815 | Wood screw | — | 2004-05-25 |
| 6302631 | Wood screw having a head with side ridges | Tsutomu Kashikura | 2001-10-16 |
| 6000892 | Wood screw | — | 1999-12-14 |
| 4834602 | Tapping screw | — | 1989-05-30 |