Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4513272 | Devices for manufacturing a magnetic quadrupole post-focusing mask | Hinne Zijlstra | 1985-04-23 |
| 4428736 | Methods of manufacturing a color display tube having a magnetic guadrupole post-focusing mask | Hinne Zijlstra | 1984-01-31 |
| 4339688 | Cathode-ray tube having a magnetic quadrupole shadow mask | — | 1982-07-13 |