Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883391 | Ball end mill | Osamu Tsujimura, Masayuki Okawa | 1989-11-28 |
| 4844666 | Insert rotary cutting tool | Osamu Tsujimura, Nobuo Hiyama | 1989-07-04 |
| 4844669 | Insert boring tool and cutting insert therefor | Osamu Tsujimura, Takayoshi Saito | 1989-07-04 |
| 4808044 | Insert cutter | Osamu Tsujimura | 1989-02-28 |
| 4808045 | End mill with throw-away tip | Osamu Tsujimura, Takayoshi Saito, Yasuzo Funaki | 1989-02-28 |