Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5681386 | Method for blending of admixtures in a sprayed concrete mass and agent for application of the method | — | 1997-10-28 |
| 5609681 | Workable cementitious compositions | Josef F. Drs, Tom Melbye, Salvatore Valenti | 1997-03-11 |
| 5494516 | Workable cementitious compositions | Josef F. Drs, Tom Melbye, Salvatore Valenti | 1996-02-27 |
| 4482273 | Process of casting or repairing concrete under water | Olav G. Tjugum | 1984-11-13 |