Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4255648 | Aquarium heater | Tsuyoshi Itakura | 1981-03-10 |
| 4192255 | Aquarium airstone device | — | 1980-03-11 |
| 4185743 | Artificial aquarium plant, anchor and container therefor | — | 1980-01-29 |
| 4186093 | Bottom aquarium filter | — | 1980-01-29 |