Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859381 | Process for preparing pitch-type carbon fibers | Hiroaki Morita, Eiji Tanigawa | 1989-08-22 |
| 4859382 | Process for preparing carbon fibers elliptical in section | Eiji Tanigawa, Kenji Nukina, Hiroaki Morita, Toyohiro Maeda | 1989-08-22 |