Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6419428 | Circular hole cutting devices | Akihito Uemura | 2002-07-16 |
| 6241434 | Drill, bit, drill tool, and manufacturing method of drill bit | — | 2001-06-05 |
| 5813802 | Drilling tool assembly and its center drill and cup shape drill | Tsuneyoshi Ajimi | 1998-09-29 |
| 5035550 | Hole saw | — | 1991-07-30 |