Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4452303 | Device and a method for recovering heat from the soil | Theodorus P. M. Bontje, Gerrit Schuldink, Gerrit H. Heetbrink, Bernardus Henricus Kok | 1984-06-05 |
| 4351791 | Method for installing a sealing body in a groove of a socket and pipe part of plastic material | — | 1982-09-28 |