Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880515 | Surface treatment method | Masato Yoshikawa, Yukihiro Kusano, Kazuo Naito, Tomonobu Hata | 1989-11-14 |
| 4874551 | .delta.-lactone derivatives and process of preparing same | Tetsuji Kametani | 1989-10-17 |
| 4872932 | Method for making rubbery composite materials by plating a metal substrate with a cobalt alloy | Masato Yoshikawa, Yukio Fukuura, Setsuo Akiyama, Makoto Nakamura, Kazuo Naito | 1989-10-10 |
| 4865918 | Sandwich structures having improved impact resistance | Itsuo Tanuma, Hideo Takeichi, Masashi Segawa | 1989-09-12 |