Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5217817 | Steel tool provided with a boron layer | Jacobus M. M. Verheijen, Andre Sikkema | 1993-06-08 |
| 5213599 | Method of manufacturing tube glass | Robert E. M. Geertman, Johannes A. G. P. Damsteegt | 1993-05-25 |
| 5164230 | Method of applying a boron layer to a steel substrate by a CVD process | Jacobus M. M. Verheijen, Andre Sikkema | 1992-11-17 |
| 5046849 | Device having an exchangeable substrate sleeve for measuring layer thickness | Petrus J. W. Severin | 1991-09-10 |
| 4208449 | Method of making an electric resistor having a resistance body consisting of silicon carbide having a negative temperature coefficient | Wilhelmus F. Knippenberg, Siegfried Hendrik Hagen | 1980-06-17 |