Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5261767 | Boring bar tool | Masaaki Nakayama, Masayuki Okawa | 1993-11-16 |
| 5156503 | Boring bar tool | Masaaki Nakayama, Masayuki Okawa | 1992-10-20 |
| 5017055 | Indexable cutter insert | Tatsuo Arai, Masaaki Nakayama, Masayuki Okawa | 1991-05-21 |
| 4966500 | Face milling cutter with cutter inserts | Tatsuo Arai, Takayoshi Saito | 1990-10-30 |
| 4954021 | Inserted rotary cutter | Tatsuo Arai, Takayoshi Saito | 1990-09-04 |
| D309317 | Ball end mill | Tatsuo Arai, Masayuki Okawa | 1990-07-17 |
| D308874 | Ball end mill | Tatsuo Arai, Masayuki Okawa | 1990-06-26 |
| 4934881 | Ball end mill | Yuzo Koesashi, Masayuki Okawa | 1990-06-19 |
| 4930945 | Insert rotary cutter | Tatsuo Arai, Takayoshi Saito, Hiroaki Hayashizaki | 1990-06-05 |
| 4927303 | Ball end mill | Masaaki Nakayama, Masayuki Okawa | 1990-05-22 |
| 4919573 | Ball end mill | Tatsuo Arai, Masayuki Okawa | 1990-04-24 |
| 4898499 | Ball end mill | Tatsuo Arai, Masaaki Nakayama, Masayuki Okawa | 1990-02-06 |
| 4883391 | Ball end mill | Tatsuo Arai, Masayuki Okawa | 1989-11-28 |
| 4844666 | Insert rotary cutting tool | Tatsuo Arai, Nobuo Hiyama | 1989-07-04 |
| 4844669 | Insert boring tool and cutting insert therefor | Tatsuo Arai, Takayoshi Saito | 1989-07-04 |
| 4834591 | Indexable cutter insert | Masaaki Nakayama, Masayuki Okawa | 1989-05-30 |
| 4808044 | Insert cutter | Tatsuo Arai | 1989-02-28 |
| 4808045 | End mill with throw-away tip | Takayoshi Saito, Tatsuo Arai, Yasuzo Funaki | 1989-02-28 |
| 4693641 | End mill with throw-away tip | Takayoshi Saito, Tatsuo Arai | 1987-09-15 |
| 4679968 | Indexable cutter insert | Ryoei Hasegawa, Masayuki Ohkawa | 1987-07-14 |