Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4329178 | Method in the manufacture of steam-cured light-weight aerated concrete with hydrophobic properties | Oystein Kalvenes, Carl-Henry Krill, Knut Helmersson | 1982-05-11 |
| 4197077 | Apparatus for use in manufacturing of cellular lightweight concrete slabs | Oystein Kalvenes, Gosta Harald Eriksson, Rolf E. Goransson | 1980-04-08 |