Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36324 | Hopper convertible material container | Tsukasa Yoda, Kazuyuki Okubo | 1999-10-05 |
| 5513777 | Hopper convertible material container | Tsukasa Yoda, Kazuyuki Okubo | 1996-05-07 |