Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6777494 | Optical terpolymer of polyisocyanate, polythiol and polyene monomers | Zhou Yang, Zhenya Zhu, Brian G. Risch | 2004-08-17 |
| 6309568 | Process method optical thermoplastic urethane resin lens and the lens | Zhou Yang, Zhenya Zhu, Tadashi Kobayashi, Yuyoshi Saito | 2001-10-30 |
| 6015512 | Extrusion-compression molding of optical articles | Zhou Yang | 2000-01-18 |
| 6008296 | Optical terpolymer of polyisocyanate, polythiol and polyene monomers | Zhou Yang, Zhenya Zhu, Brian G. Risch | 1999-12-28 |
| 5679756 | Optical thermoplastic thiourethane-urethane copolymers | Zhenya Zhu, Brian G. Risch, Zhou Yang | 1997-10-21 |