Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8172061 | Clutch friction material and method of forming same | John Gaffney, David Giannelli, Timothy M. Anguish | 2012-05-08 |
| 6505709 | Sleigh shaped device for mining raises | — | 2003-01-14 |
| 5090487 | Drill head with integral impact hammers | — | 1992-02-25 |
| 4840235 | Impact hammer assembly for drilling rock | — | 1989-06-20 |
| 4762188 | Drill bit | — | 1988-08-09 |
| 4682819 | Method and apparatus for drilling hard material | — | 1987-07-28 |
| 4410053 | Apparatus for drilling hard material | — | 1983-10-18 |
| 4252030 | Force converter | — | 1981-02-24 |