Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810676 | Chromium oxide-base ceramic material | Tadahiko Watanabe, Yuji Enomoto | 1989-03-07 |
| 4808557 | Sintered titanium carbo-nitride ceramics | Tadahiko Watanabe, Yuko Tsuya, Yuji Enomoto, Junshiro Hayakawa, Osamu Yagishita +2 more | 1989-02-28 |