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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 |
| 5687649 | Monorail track structure A splice plate for monorail track sections includes a mechanism for drawing the sections together and for leveling the top surfaces of the track with respect to one another. A hanger bracket which is used to attach the track to a support structure connect... | 11/18/1997 |
