Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6331133 | Automatic drill bit re-pointing apparatus and method | Ichiro Katayama, Yoshinobu Watanabe, Yuichi Nakajima | 2001-12-18 |
| 6260701 | Drill bit case with re-configurable shank retainer and stand base | Ichiro Katayama | 2001-07-17 |