Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8622479 | Mining methods and apparatus | Chad Owen Hargrave, David William Hainsworth, Jonathan Carey Ralston, Michael S. Kelly, Ronald John McPhee | 2014-01-07 |
| 6857705 | Mining machine and method | David William Hainsworth | 2005-02-22 |
| D406866 | Wire puzzle | — | 1999-03-16 |