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| Number | Title | Issue Date |
| 6442439 | Pendulation control system and method for rotary boom cranes A command shaping control system and method for rotary boom cranes provides a way to reduce payload pendulation caused by real-time input signals, from either operator command or automated crane maneuvers. The method can take input commands and can apply ... | 08/27/2002 |
| 5445281 | Light-duty electric crane A light-duty electric crane structure includes a base, a supporting mast, a movable boom and an electric winch. The base is mountable onto a truck body, and the supporting mast is placed into a holding pipe of the base and can be rotatably adjusted relati... | 08/29/1995 |
| 5207337 | Swing controlled crane A portable crane includes a bracket mounted on a shaft extending upwardly from bearings on the vehicle; a boom extending outwardly from the bracket, a spool rotatable in the bracket carrying a cable, which extends outwardly around a pulley, a hook on the ... | 05/04/1993 |
| 4560074 | Scaffold mounted hoist There is disclosed a hoist adapted to be mounted on a conventional sectional scaffold structure in which the hoist apparatus consists of a boom assembly to be mounted near the top of a scaffold structure and a winch assembly to be mounted near the bottom ... | 12/24/1985 |
