Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873052 | Method of manufacturing a scandate dispenser cathode and scandate dispenser cathode manufactured according to the method | Jan Hasker, Wim Kwestroo | 1989-10-10 |
| 4854956 | Method of manufacturing optical fibres having a core and a cladding of glass applying the rod-in-tube technique | Rene A. M. Pluijms, Emmanuel Papanikolau, Leendert B. Jongeling | 1989-08-08 |
| 4806818 | Method of providing electrical contact to a semiconductor cathode, cathode so produced, and electron tube provided with such cathode | Jacobus Stoffels, Petrus J. M. Peters | 1989-02-21 |