Issued Patents 1997
Showing 1–2 of 2 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 |