Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6337013 | Removable filter with jack sealing device and vacuum cleaning heads | Kevin Graydon McCauley | 2002-01-08 |
| 4760741 | Borehole dilatometer with intensifier | Robin Hughes | 1988-08-02 |
| 4733568 | Borehole dilatometer intensifier | Robin Hughes | 1988-03-29 |
| 4657306 | Hydraulic rock breaking tool | Robin Hughes | 1987-04-14 |