Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6126850 | Freeze-preventing material and method for preventing pavement surface from freezing | Tetsuhiko Yamaguchi, Masaki Sazawa, Kenichi Kitamura | 2000-10-03 |
| 5934011 | Seedling culture mat | Tetsuhiko Yamaguchi | 1999-08-10 |