Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5326501 | Polythiol compound, and optical material and product produced therefrom | Tsuyoshi Ohkubo, Chau Nguyen | 1994-07-05 |
| 5294666 | Polymer for optical products and process for preparation thereof | Tsuyoshi Ohkubo, Masahisa Kosaka | 1994-03-15 |