Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842958 | Chromate surface treated steel sheet | Seijun Higuchi, Tomonari Ohga, Toshinori Katayama | 1989-06-27 |
| 4801186 | Coated optical fiber, fabrication process thereof and fabrication apparatus thereof | Makoto Wagatsuma, Takao Kimura, Yoshito Shuto, Shinzo Yamakawa | 1989-01-31 |