Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5670711 | Portable rock strength evaluation device | Emmanuel Detournay, David Allan Hultman | 1997-09-23 |
| 5063785 | Plane-strain apparatus | Joseph F. Labuz, Ioannis G. Vardoulakis | 1991-11-12 |