Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622924 | Viscosity index improver and lubricating oil | Hidehiko Matsuya, Yoshihisa Ohta | 1997-04-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622924 | Viscosity index improver and lubricating oil | Hidehiko Matsuya, Yoshihisa Ohta | 1997-04-22 |