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| Number | Title | Issue Date |
| 4099630 | Pipe handling apparatus Pipe handling apparatus for transporting pipe between a derrick floor and a pipe rack by a cable-way. A portion of the cable overhangs the derrick floor and the pipe rack. Spaced apart pipe receiving carriages are supported by the cable and are provided w... | 07/11/1978 |
| 4098532 | Quick engage and release sling for tubular members A pipe lay down machine which incorporates a main cable adapted to be rigged from the rig floor to a winch overlying a pipe rack where the winch is bidirectionally operable to slack the main line. Wheeled carriages travel up and down the main line. The ca... | 07/04/1978 |
| 4054210 | Apparatus for transporting and handling pipe Pipe handling apparatus for transporting pipe in a pipe carrier between a pipe rack and a derrick floor wherein the pipe carrier is supported by a first cable and is manipulated between the pipe rack and the derrick floor by a second cable which is operab... | 10/18/1977 |
