Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6758356 | Liftcrane with synchronous rope operation | David J. Pech | 2004-07-06 |
| 6695158 | Crane with self-raising mast | John N. Taylor | 2004-02-24 |
| 6481202 | Hydraulic system for boom hoist cylinder crane | Charles R. Wernecke, David J. Pech | 2002-11-19 |
| 6269635 | Control and hydraulic system for a liftcrane | — | 2001-08-07 |
| 5579931 | Liftcrane with synchronous rope operation | David J. Pech | 1996-12-03 |
| 5297019 | Control and hydraulic system for liftcrane | — | 1994-03-22 |
| 5189605 | Control and hydraulic system for a liftcrane | David J. Pech | 1993-02-23 |