Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6963678 | Electro-optical transducer with multi-reflector beam-expanding and collimating input/output device | David R. Porter, Ralph Johnson | 2005-11-08 |
| 6625376 | Fiber-optic cable terminal connector and alignment device and method | David R. Porter, Ralph Johnson | 2003-09-23 |
| 6600855 | Reflection suppression in multiple-reflector collimation system | David R. Porter, Ralph Johnson | 2003-07-29 |
| H542 | Fiber optic variable focus lens | — | 1988-11-01 |