Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342651 | Method for manufacturing modified wood | Hiroaki Usui, Shozo Hirao, Satoru Konishi, Hiroyuki Ishikawa, Kenji Oonisi | 1994-08-30 |
| 5318802 | Modifying a wood material utilizing formaldehyde polymer and sulfur dioxide | Hiroyuki Ishikawa, Hiroaki Usui | 1994-06-07 |