Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6375396 | Hole cutting tool with drill pilot | Michael Fangmann, Robert E. Strange | 2002-04-23 |
| 5415503 | Portable drilling machine with internal motor control cord | Robert E. Strange, Michael Fangmann | 1995-05-16 |
| 5281060 | Annular hole cutter | Robert E. Strange, Michael Fangmann, Timothy M. Flaherty | 1994-01-25 |
| 4596499 | Center-free drill | Michael Fangmann, Robert E. Strange | 1986-06-24 |