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| Number | Title | Issue Date |
| 6279484 | Actuating mechanism for a transit vehicle guide beam switch A mechanism is disclosed for actuating a switch guide beam swinging laterally between two or more fixed guide beam ends, in order to make a route selection for a beam guided vehicle. The moving guide beam pivots distantly of the primary fixed guide beam e... | 08/28/2001 |
| 4599032 | Rolling base for truck cranes A rolling base assembly for truck cranes which allows movement of the truck crane under load-carrying conditions. The device comprises a fixed chain installed along the centerline of a flatbed trailer. A rolling base, having outboard roller housing assemb... | 07/08/1986 |
| 3937151 | Mineral mining equipment A track member for a mineral mining machine which hauls itself along a working face by engaging a flexible round link chain has pockets for fixedly engaging those links of the chain lying in a first plane and a continuous groove interconnecting the pocket... | 02/10/1976 |
