Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4673417 | Rigid discharge electrode | Henrik Stomberg | 1987-06-16 |
| 4671808 | Arrangement for supporting a plurality of discharge electrodes, and a discharge electrode suited to the arrangement | — | 1987-06-09 |
| 4619173 | Method and apparatus for lifting pieces of material | Oystein Kalvenes | 1986-10-28 |
| 4528883 | Apparatus for dividing aerated concrete blocks | Oystein Kalvenes | 1985-07-16 |
| 4202228 | Method of cutting slabs from a body of uncured, light-weight concrete and an apparatus for carrying out the method | — | 1980-05-13 |
| 4197077 | Apparatus for use in manufacturing of cellular lightweight concrete slabs | Oystein Kalvenes, Gosta Harald Eriksson, Percy Svensson | 1980-04-08 |