Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7757787 | Drilling and hole enlargement device | Alexander Craig Mackay, Charles H. Dewey | 2010-07-20 |
| 6131677 | Steel-bodied bit | Robert W. Arfele, Ed Martin | 2000-10-17 |
| 5924502 | Steel-bodied bit | Robert W. Arfele, Ed Martin | 1999-07-20 |
| D405811 | Seven blade drill bit | Robert W. Arfele, Ed Martin | 1999-02-16 |
| D404407 | Eight blade drill bit | Robert W. Arfele, Ed Martin | 1999-01-19 |
| D404044 | Six blade drill bit | Robert W. Arfele, Ed Martin | 1999-01-12 |
| D403335 | Four blade drill bit | Robert W. Arfele, Ed Martin | 1998-12-29 |
| D403336 | Five blade drill bit | Robert W. Arfele, Ed Martin | 1998-12-29 |
| D403003 | Nine blade drill bit | Robert W. Arfele, Ed Martin | 1998-12-22 |