Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D303265 | Hopper | Muneo Isayama | 1989-09-05 |
| 4836421 | Transportable hopper and tank assembly | Muneo Isayama, Shoichi Midorikawa, Akitada Ota | 1989-06-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D303265 | Hopper | Muneo Isayama | 1989-09-05 |
| 4836421 | Transportable hopper and tank assembly | Muneo Isayama, Shoichi Midorikawa, Akitada Ota | 1989-06-06 |