Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5403938 | Polythiol compound, and optical material and product produced therefrom | Tsuyoshi Ohkubo, Chau Nguyen | 1995-04-04 |
| 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 |
| 5118548 | Substrate for information-recording media | Tsuyoshi Ohkubo, Mayumi Kageyama, Takeyuki Sawamoto | 1992-06-02 |
| 4798762 | Laminate board containing uniformly distributed filler particles and method for producing the same | Hisami Fujino | 1989-01-17 |
| 4661301 | Method for producing laminate board containing uniformly distributed filler particles | Hisami Fujino | 1987-04-28 |