Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5078941 | Process for the production of a resin-laminated rubber closure for a medical vial | Yutaka Tatsumi, Hideo Yoshitaka, Tatsuya Matsunaga, Tamotsu Okuda | 1992-01-07 |
| 4915243 | Resin-laminated rubber closure for a medical vial | Yutaka Tatsumi, Hideo Yoshitaka, Tatsuya Matsunaga, Tamotsu Okuda | 1990-04-10 |
| 4441621 | Pierceable closure member for vial | Yoshiharu Matukura | 1984-04-10 |