Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4746345 | Method of manufacturing solid glass preforms from hollow preforms | Rene A. M. Pluijms, Hubertus J. E. M. Schrans, Johannes P. De Meij | 1988-05-24 |
| 4571522 | Method of manufacturing a low-pressure mercury vapor discharge lamp, a low-pressure mercury vapor discharge lamp manufactured by means of this method, and a device for carrying out this method | Jan de Vries | 1986-02-18 |