Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837481 | Cerium and terbium activated luminescent material and mercury vapor discharge lamp containing the same | Johannus G. Verlijsdonk, Emiel P. J. de Meester, Willebrordus H. M. M. Van de Spijker, Johannes G. Verriet | 1989-06-06 |
| 4441049 | Luminescent material and discharge lamp containing the same | Johannus G. Verlijsdonk, Emiel P. J. de Meester, Willebrordus H. M. M. Van de Spijker, Johannes G. Verriet | 1984-04-03 |
| 4216408 | Luminescent material and discharge lamp and cathode ray tube containing the same | Johannus G. Verlijsdonk, Emiel P. J. de Meester, Willebrordus H. M. M. Van de Spijker, Johannes G. Verriet | 1980-08-05 |