Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848603 | Holding furnace of constant molten metal level | Sadayoshi Yamada | 1989-07-18 |
| 4828460 | Electromagnetic pump type automatic molten-metal supply apparatus | Hirozi Saito, Noriyuki Motomura | 1989-05-09 |