Issued Patents 2023
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11840035 | Pad transfer printing method for making colored contact lenses | Richard Charles Breitkopf, Steve Yun Zhang | 2023-12-12 |
| 11602910 | Pad transfer printing method for making colored contact lenses | Richard Charles Breitkopf, Steve Yun Zhang | 2023-03-14 |
| 11584097 | Method for making opaque colored silicone hydrogel contact lenses | Steve Yun Zhang, Richard Charles Breitkopf | 2023-02-21 |