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| Number | Title | Issue Date |
| 5573363 | Floating conveyor system A floating conveyor system includes a number of serially interconnected conveyor units for transferring sand, gravel and other material from a floating dredge to a land based station for processing. Each conveyor unit is supported by pontoons or floats ov... | 11/12/1996 |
| 4659275 | Barge tipper A barge tipper comprises a cylindrical floating apparatus 10 defining a chamber 18 into which a barge 28 can be floated. End doors 16 at either end of the apparatus 10 are closed and the barge 28 is clamped in position by hydraulically operated clamps 20.... | 04/21/1987 |
