Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882108 | Method for producing polypropylene foam | Yoshio Nakajima, Yoshinobu Nagaoka | 1989-11-21 |
| 4801186 | Coated optical fiber, fabrication process thereof and fabrication apparatus thereof | Makoto Wagatsuma, Fumio Yamamoto, Yoshito Shuto, Shinzo Yamakawa | 1989-01-31 |