Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4732959 | Polyesterpolyol derivative and a poly(urethane)ureamide obtained therefrom | Yoshio Yamada | 1988-03-22 |
| 4537945 | Polyether derivative and a poly(urethane)ureamide obtained therefrom | Yoshio Yamada | 1985-08-27 |
| 4515981 | Polyetherpolyol derivative and process for preparing the same | Yoshio Yamada | 1985-05-07 |
| 4504648 | Polyurethaneurea and process for preparing the same | Yoshio Yamada, Hiroyuki Okumura | 1985-03-12 |