Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5993116 | Filler-containing rock bolt anchoring system and method of preparation thereof | Ronald L. Paxton, Timothy J. Shean | 1999-11-30 |
| 5934990 | Mine stopping | John Steffenino, Timothy J. Shean, C. Dempsey Holstein | 1999-08-10 |