Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4325736 | Process for preparation of AE concrete or AE mortar | Koji Sakagami | 1982-04-20 |
| 4249948 | Additive for air-entrained concrete or air-entrained mortar | Koji Sakagami | 1981-02-10 |