Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4806821 | Cathode ray tube having an electron gun with bipotential focusing lens | — | 1989-02-21 |
| 4807014 | Three tube color projection television system having multispot blue tube and single-spot red and green tubes | Leendert Vriens, Arne L. Duwaer, Johannes H. M. Spruit, Alexander R. H. Van Schoonhoven | 1989-02-21 |