Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4324341 | Easily openable cover member | Tsukasa Yoshikawa | 1982-04-13 |
| 4324342 | Easily openable cover member | Tsukasa Yoshikawa | 1982-04-13 |
| 4256239 | Easily openable cover member | Tsukasa Yoshikawa | 1981-03-17 |