Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4666599 | Water purification device | — | 1987-05-19 |
| 4543902 | Construction of hull of vessel such as tanker | — | 1985-10-01 |
| 4398295 | Apparatus for regenerating activated carbon | Toyoji Kumada | 1983-08-09 |