Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5098943 | Water repellent and water repellent gypsum composition | Toru Tagawa, Takao Tadenuma | 1992-03-24 |
| 4748196 | Water repellent composition | Katsuhiko Kuroda, Toru Tagawa, Kiyoharu Yoshimi | 1988-05-31 |