Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6131676 | Small disc cutter, and drill bits, cutterheads, and tunnel boring machines employing such rolling disc cutters | Michael A. Anderson | 2000-10-17 |
| 5961185 | Shielded cutterhead with small rolling disc cutters | Levent Ozdemir | 1999-10-05 |
| 5904211 | Disc cutter and excavation equipment | Levent Ozdemir | 1999-05-18 |
| 5626201 | Disc cutter and method of replacing disc cutters | Levent Ozdemir | 1997-05-06 |