Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832713 | Gas-selectively permeable membrane and method of forming said membrane | Koichi Okita | 1989-05-23 |
| 4822361 | Tubular prosthesis having a composite structure | Koichi Okita, Shigeru Asako, Kazuhiro Okabe, Tohru Kashiwagi | 1989-04-18 |