Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4578408 | Polyester resin composition resistant against discoloration by light | Masatoshi MATSUOKA, Yukio Ikenaga | 1986-03-25 |
| 4274986 | Polyacetal molding composition | Yukio Ikenaga | 1981-06-23 |