Oystein Kalvenes

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for lifting pieces of material
- Patent number 4,619,173
- Issue date Oct 28, 1986
- Internationella Siporex AB
- Rolf E. Goransson
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Apparatus for dividing aerated concrete blocks
- Patent number 4,528,883
- Issue date Jul 16, 1985
- Internationella Siporex AB
- Rolf E. Goransson
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method in the manufacture of steam-cured light-weight aerated concr...
- Patent number 4,329,178
- Issue date May 11, 1982
- Internationella Siporex Aktiebolag
- Oystein Kalvenes
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Apparatus for use in manufacturing of cellular lightweight concrete...
- Patent number 4,197,077
- Issue date Apr 8, 1980
- Internationella Siporex AB
- Oystein Kalvenes
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method of manufacturing steam-cured porous concrete products
- Patent number 4,108,933
- Issue date Aug 22, 1978
- Internationella Siporex AB
- Rolf Erik Goransson
- B28 - WORKING CEMENT, CLAY, OR STONE