Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9573849 | Backfill, methods of making, and use thereof | Robert J. Purcell, Dennis Parker, Rudolph Coetzee, Steven B. Feldman | 2017-02-21 |
| 9416052 | Concrete materials with modified rheology, methods of making, and uses thereof | Steven B. Feldman, Robert J. Purcell, Peter Tutbury, Dennis Parker, Rudolph Coetzee | 2016-08-16 |