Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873071 | Graphite structures and method for production thereof | Yasuhiro Yamada, Takeshi Imamura, Masaki Fujii, Masanori Minohata | 1989-10-10 |
| 4818449 | Process to prevent crack formation in the production of carbon fibers | Yasuhiro Yamada, Takeshi Imamura, Masatoshi Tsuchitani, Ryoichi Nakajima | 1989-04-04 |