Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4657561 | Method of recovering fuel from coal ash | Hayami Itoh | 1987-04-14 |
| 4288420 | Removal of nitrogen oxides and sulfur oxides by ammonia | Hayami Ito, Yasuyuki Nakabayashi, Kihachiro Igarashi, Kunihiko Mouri, Takashi Ikeda | 1981-09-08 |