Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5688147 | Interchangeable key card edge connecting | Thomas M. Cipolla | 1997-11-18 |
| 5619219 | Secure viewing of display units using a wavelength filter | Douglas S. Goodman | 1997-04-08 |
| 5614920 | Secure viewing of display units using an electronic shutter | Douglas S. Goodman | 1997-03-25 |