Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703721 | Optical magnifier | Joseph Bietry, Lee R. Estelle | 1997-12-30 |
| 5680260 | Optical element assembly having optical elements with mounting extensions | Martin P. Farcella, Joseph Bietry | 1997-10-21 |