Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4938642 | Portable electric router | Kihachiro Matsumoto, Katsuhiko Muto, Yasunori Ogawa | 1990-07-03 |
| 4669190 | Portable motor-driven cutter | Tatsuo Innami, Katuo Koizumi, Kihachiro Matsumoto | 1987-06-02 |