Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883606 | Water-soluble temper rolling oil and method of temper rolling | Shuichi Iwado, Yoichi Koga, Tomoya Izushi, Toshimi Muto, Nobuomi Kuroi | 1989-11-28 |
| 4810589 | Steel foil having excellent shielding characteristics to electromagnetic waves | Masaharu Jitsukawa, Yoshihiro Hosoya | 1989-03-07 |