Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859531 | Method for bonding a cubic boron nitride sintered compact | Kazuwo Tsuji, Hitoshi Sumiya, Nobuo Urakawa, Keiichi Satoh | 1989-08-22 |
| 4828611 | High hardness sintered compact and process for producing the same | Tetsuo Nakai, Syuzi Yazu, Keizo Asai | 1989-05-09 |