Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5294219 | Ball end mill | Tatsuo Arai, Masayuki Okawa | 1994-03-15 |
| 5197831 | Cutting insert for ball end mill | Tatsuo Arai, Masayuki Okawa | 1993-03-30 |
| 5090849 | Rotary cutting tool | Tatsuo Arai, Katsumi Haga, Takayoshi Saito, Ryoei Hasegawa, Kazuo Iizuka | 1992-02-25 |
| 5082400 | Insert rotary cutter | Masaaki Nakayama | 1992-01-21 |
| 5026221 | Rotary cutting tool | Tatsuo Arai, Ryoei Hasegawa, Kazuo Iizuka | 1991-06-25 |
| 5017060 | Rotary cutting tool | Kazuo Iizuka | 1991-05-21 |