Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4690589 | Method for forming a water-impermeable layer in a soil | — | 1987-09-01 |
| 4637759 | Method for forming a moisture barrier in a soil containing soluble salts | Yoshiro Tanaka, Takeshi Saito, Yoshiro Takeda | 1987-01-20 |