Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837481 | Cerium and terbium activated luminescent material and mercury vapor discharge lamp containing the same | Judicus M. P. J. Verstegen, Johannus G. Verlijsdonk, Emiel P. J. de Meester, Johannes G. Verriet | 1989-06-06 |
| 4441049 | Luminescent material and discharge lamp containing the same | Judicus M. P. J. Verstegen, Johannus G. Verlijsdonk, Emiel P. J. de Meester, Johannes G. Verriet | 1984-04-03 |
| 4382207 | Luminescent material and discharge lamp containing the same | Judicus M. P. Jan Verstegen, Johannus G. Verlijsdonk, Emiel P. J. de Meester, Johannes G. Verriet | 1983-05-03 |
| 4233538 | Luminescent lead-activated alkaline earth metal rare earth metal borates and mercury vapor discharge lamp containing the same | Willem L. Konijnendijk | 1980-11-11 |
| 4216408 | Luminescent material and discharge lamp and cathode ray tube containing the same | Judicus M. P. J. Verstegen, Johannus G. Verlijsdonk, Emiel P. J. de Meester, Johannes G. Verriet | 1980-08-05 |