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| Number | Title | Issue Date |
| 7073238 | Single slitting process for recycling rail A method for recycling rail is provided wherein the rail is heated, and then slit into two pieces. The two pieces are passed through a single mill pass line such that each piece of the rail is deformed to have a generally uniform shape. ... | 07/11/2006 |
| 4802623 | Concrete cross sleeper system Modern D.C.-tractioned trains and track circuit signal systems as well as high load trains need a special track construction. A new concrete cross sleeper system is provided for high load and high velocity tracks as well as for urban rapid transit systems... | 02/07/1989 |
| 4756476 | Railway switch A railway switch is mounted on y-shaped sleepers. All sleepers in the switch have a medium portion of equal slightly s-shaped configuration and length. The length of the straight and parallel ends depends on the position of the individual sleeper in the s... | 07/12/1988 |
