Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4985307 | Flame retardant for wood and flame resistant wood | Nobuo Kobayashi, Kiyoshi Umehara | 1991-01-15 |
| 4839099 | Fire-retardant for woody materials | Kiyoshi Umehara, Nobuo Kobayashi, Tsutomu Imai | 1989-06-13 |