Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4677976 | Emergency mask | Katsumi Fujinuma, Tsuneyoshi Takase | 1987-07-07 |
| 4572178 | Emergency mask | Tsuneyoshi Takase | 1986-02-25 |
| 4462896 | Method of removing arsenic in hydrocarbons | Hiroshi Kitagawa, Teruyuki Onodera, Toshiyuki Fukushima | 1984-07-31 |