Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4309952 | Process for making a container cover member having synthetic resin openable portion | Keiichi Takahashi, Hiroshi Aoyama, Yukio Sarusawa | 1982-01-12 |
| 4244491 | Container cover member having synthetic resin openable portion | Keiichi Takahashi, Hiroshi Aoyama, Yukio Sarusawa | 1981-01-13 |