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| Number | Title | Issue Date |
| 4876784 | Method for on-site maintenance of guardrails A method for on-site maintenance of a guardrail consisting of a continuous strip of metal section segments supported on posts at joints between adjacent segments, the guardrail is split at one of joints and the segments of one of the resulting two portion... | 10/31/1989 |
| 3942579 | Process for the aluminothermic welding of rails A process for the aluminothermic welding of rails in which the rail ends to be joined are surrounded by a prefabricated, dry refractory casting mold and sealed from the rails with plastic mold materials, such as, moistened sand; a reaction crucible is arr... | 03/09/1976 |
