Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4391477 | Quick release mounting for a turntable bearing | — | 1983-07-05 |
| 4387813 | Movable ring supported lift crane | Daniel E. Beduhn | 1983-06-14 |
| 4387814 | Traveling attachment for ring supported lift crane | Daniel E. Beduhn | 1983-06-14 |
| 4382519 | Traveling attachment for ring supported lift crane | Daniel E. Beduhn | 1983-05-10 |
| 4381060 | Ring supported mobile tower crane | Michael C. Anderson | 1983-04-26 |
| 4358021 | Separated ring segment dual pivot lift crane | Percy R. Helm | 1982-11-09 |
| 4316548 | Concentric ring segment supported lift crane | Percy R. Helm | 1982-02-23 |
| 4284265 | Dual drive system for dragline with power interlock | — | 1981-08-18 |
| 4195740 | Lift crane support system | Daniel E. Beduhn | 1980-04-01 |
| 4194638 | Ring supported tower crane | Michael C. Anderson, Richard L. Siehr | 1980-03-25 |