Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10883366 | Mine roof support | George A. Watson | 2021-01-05 |
| 10774641 | Load support drum with resilient core member | George A. Watson | 2020-09-15 |
| 8967916 | Mine roof support apparatus and system | Brian Czartorski | 2015-03-03 |
| 8851804 | Pumpable support with cladding | Stephen G. Sawyer, George A. Watson | 2014-10-07 |
| 8807661 | Method of controlling ventilation in a mine entry with polymeric gel | — | 2014-08-19 |
| 8801338 | Nested mine roof supports | — | 2014-08-12 |
| 8777522 | Mine seal with multiple mortared walls | George A. Watson, Stephen G. Sawyer | 2014-07-15 |
| 8342776 | Mine seal with adhesive | George A. Watson, Stephen G. Sawyer | 2013-01-01 |
| 8096622 | Method of controlling mine fires with polymeric gel | — | 2012-01-17 |
| 5725327 | Permanent mine bulkhead seal and method for constructing same | Fred Stafford III | 1998-03-10 |
| 5401120 | Pumpable mine seal | William R. Semethy, Jr. | 1995-03-28 |
| 5385504 | Permanent ventilation seal | Fred Stafford | 1995-01-31 |