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| Number | Title | Issue Date |
| 6557775 | Dolly track A portable, folding camera dolly track is assembled from a number of folding track sections, each track section having a parallel pair of rails, each rail having a base and a cylindrical wheel-supporting rail element, and a transverse spacer. A continuous... | 05/06/2003 |
| 5887787 | Offset dolly tracks for TV video and motion picture cameras An improved track assembly for TV, video and motion picture camera dollys. The inventive assembly includes first and second rail sections. The rail sections are connected by first and second spreaders. Each spreader is pivotally connected to the rails at ... | 03/30/1999 |
