Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6733130 | Method for refracting and dispensing electro-active spectacles | Ronald D. Blum, Dan Katzman | 2004-05-11 |
| 6619799 | Optical lens system with electro-active lens having alterably different focal lengths | Ronald D. Blum | 2003-09-16 |
| 6517203 | System, apparatus, and method for correcting vision using electro-active spectacles | Ronald D. Blum | 2003-02-11 |
| 6491391 | System, apparatus, and method for reducing birefringence | Ronald D. Blum, Youval Katzman, Israel Grossinger, Uzi Efron, Dan Katzman | 2002-12-10 |
| 6491394 | Method for refracting and dispensing electro-active spectacles | Ronald D. Blum, Dan Katzman | 2002-12-10 |