Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829211 | Method of manufacturing a color display tube having a magnetic quadrupole post-focusing mask and a color display tube made by the method | Johannes T. C. Van Roosmalen, Robert H. J. Fastenau, Matthijs J. Baan Hofman, Johannes T. Klomp | 1989-05-09 |