Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5338927 | Proximity focusing image intensifier tube with spacer shims | Paul de Groot | 1994-08-16 |
| 5319189 | X-ray image intensifier tube having a photocathode and a scintillator screen positioned on a microchannel array | Paul de Groot | 1994-06-07 |