Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4743422 | Method for manufacturing a sealing body for a pipe joint | Erling Kalriis-Nielsen, Johannes H. Beune | 1988-05-10 |
| 4492867 | Method of and apparatus for determining the state of ageing of plastic products | Jan P. van Dongeren, Hendrik de Wit, Louis Marie SMEETS | 1985-01-08 |