Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7415783 | Boom support strand oscillation dampening mechanism | Harvey J. Kallenberger, Rikos A. Kasim | 2008-08-26 |
| 7367090 | Fitting for wire rope | Harvey J. Kallenberger, Rikos A. Kasim | 2008-05-06 |
| 5676471 | Dragline with improved thrust bearing assembly supporting upper structure | Harvey J. Kallenberger | 1997-10-14 |
| 5636459 | Dragline including improved boom | — | 1997-06-10 |
| 5603174 | Dragline including improved walking mechanism | Harvey J. Kallenberger | 1997-02-18 |
| 4690573 | Adjuster for thrust washer wear | — | 1987-09-01 |