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| Number | Title | Issue Date |
| 4336760 | Earth working apparatus including aerators and material dispensers An earthworking implement comprising a frame on which are supported front wheels, rear wheels and a rearmost dolly wheel. An aerator member with blades is rotatably secured to the frame between the front and rear wheels. The dolly wheel is mounted on the ... | 06/29/1982 |
| 3982582 | Method and apparatus for casting metals into a continuous casting mold A method and apparatus for casting of metals into a continuous casting mold wherein metal is cast out of a ladle into a tundish having at least one non-regulatable bottom discharge and into at least one mold by means of a pouring tube. After the start of ... | 09/28/1976 |
